Bread or Pain
Bread or Pain
HISTORY
The invention of leavened bread is attributed to the Egyptians who cooked flat cakes made of millet &
barley on heated stones & might have discovered fermentation by chance, with a piece of dough which had become
sour. At the time of the Exodas, the Hebrews did not take with them any leaven, hence the tradition of unleavened
bread to commemorate the crossing of the red sea. The Greeks cooked loaves made of rye or oats, or sometimes
wheat, on a grid r in a kind of oven. The Romans cooked their bread in household ovens, made of brick & earth &
often flavoured it with the seeds of poppy, fennel or cumin or with parsley. From, Italy, the use of bread spreads
through out the Roman Empire. The Gauls kneaded barley beer into dough & obtained a well raised bread of good
quality.
It was in the Middle Ages that the bakery trade began to develop, from this time, bread become very varied &
many different kinds were produced. This included the hall bread, for distinguished guests, hulled bread (made
from bran), intended for servants, whole meal bread, with a well cooked crushed, and kept for making bread crumbs
& trencher breads used as plates for cutting up meat. Soft or queen bread was enriched with milk & egg yolk,
German whet bread had a very hard, Gonesse & Melun loaves were supplied for a long time to the best bakeries of
Paris & variegated bread was made of alternate layers brown & white bread.
In the 17th century a new method of fermentation was developed, using milk, salt & beer barn to
manufacture finer loaves made of long moulds. Gentilly, Segovia, Bread A Lespirit, Bread A Lmerechale & horned
bread. For a long time, the quality of bread dependent on the flour used & therefore on its colour. White bread or the
rich, lack bread for the poor. In 1840, Viennese bread was introduced into France by a man called Zang, secretary of
the Australian Embassy in Paris. He created the first bakery using Viennese methods. Fine wheat flour was kneaded
with milk & water to produce long loaves or rolls that become one of the classic French Breads.
Yeast is a living plant available fresh or dried. When mixed with flour & liquid it gives off carbon di oxide,
which expands, making the dough rise.
Bi carbonate of soda is the main raising agent for quick breads. When added to liquid & heated, it gives off
carbon di oxide which expands & makes the dough rise.
Cream the tartare is often used with bi carbonate of soda as it reacts with it to help to neutralize the slightly
soapy taste of bi carbonate of soda.
Baking powder is a readymade mixture of bi carbonate of soda & acid (often cream of tartare), which
produces carbon di oxide when it comes into contact with moisture. It is also used for quick breads.
YEAST
This is the ingredient that makes bread rise. You can buy it either fresh or dried and both work well. Both fresh and
dried yeast should be stored properly in a cool place. Remember also that the more fat and sugar dough contains, the more
yeast you are going to need. It is a microscopic single celled plant, and there are many different varieties all around us in the air
and on the leaves and fruit of plants. In the right conditions yeast will reproduce rapidly and produce ferments, which are
capable of breaking down starch and sugar converting them in to carbon dioxide and alcohol. It is the production of carbon
dioxide gas in bread making which makes the dough rise, while the by products that are formed during the working of the yeast
ferments give the bread its special flavour. A different types of yeast is used in beer and wine making. This has a higher alcohol
tolerance than other yeast.
Carbohydrates, air, water and warmth, in suitable proportion, are all necessary for the rapid growth of yeast. A certain
amount of sugar enables it to grow quickly, though too much shrinks the cells and prevents budding. Too much salt and fat also
slow down the budding process. All liquids used for yeast mixtures should be liquewarm, as cold retards the growth, and
excess heat kills the yeast plant.
Yeast is a source of the 'B' group vitamins, and is sometimes prescribed medically, either in its natural form or as one
of the manufactured yeast extracts.
Types of yeasts :-
1. Baker's Yeast :- It is the type used for bread making. It is available fresh or as dried granules. Fresh yeast will keep
only for two or three days, after which it crumble- easily, becomes darker in colour and has a stale smell. It is best to buy just
enough for immediate use. It can, however, be stored in the freezer for upto a year.
There are different varieties of dry yeast granules and the manufacture's instruction should be followed. When using
dry yeast in a recipe specifying fresh using specifying yeast, allow half the quantity of the dried type. To add it to other
ingredients in bread making, dissolve the dried yeast with 5ml. (1 tsp) sugar in some of the liquid taken from the amount stated
in the recipe. Leaving a warm place for above 10 mins, or until frothy, then mix with the dry ingredients and the remaining
liquid to make a dough. Easy blend dried yeast can be mixed with the dry ingredients without adding to liquid first.
2. Brewer's Yeast :- It is used for brewing. There are two types in generally used. Top fermenting yeast works on the
surface of the vat and is used for making beer; bottom-fermenting yeast is used for brewing lager.
Wine yeasts come in powder, granular or tablet form as well as liquid yeast cultures.
FLOUR
Wheat is either hard or soft depending on its gluten content. When hard wheat is milled it produces a strong
flour, rich in protein containing a sticky rubber like substances called gluten. In read making, the gluten starches like
elastic & as it is heated, it expands & traps in the dough the carbon di oxide released by the yeast. The gluten then
sets & forms the frame of the bread. It is the gluten content in the strong flour that gives volume & open texture of
bread & best results are obtained by using this flour.
When soft wheat is milled they produce flour with different gluten properties. More suited to the making of
cakes & pastries where a smaller rise & closer, finer texture are required. This ordinary soft flour which is either
plain or self raising can be used for bread but it will give a smaller rise & colour crurnchy texture with a pale, hard
crust & a disappointing result. Self-raising flour can be used for recipes in quick breads.
Generally bread made with whole meal flour has a closer texture & a stronger more distinctive taste than
white bread.
Types of Wheat flour :-
1. Whole meal (Whole what) Flour :- It contains 100% of the wheat grain. However much of the whole meal
flour sold is produced by the steel roller process which automatically remove the bran & germ to the milled flour
after processing, which has already destroyed many of the nutrients they contain. Strong, plain & self-raising types
of whole meal flour are available.
2. Brown (Wheat meal) Flour :- It contains 80 – 90% of wheat and it is more absorbent than white flour. It is
available in strong, plain and self-raising forms. Self-raising.
3. White Flour :- It contains 72 -- 74% of the wheat grain. The bran and wheat germ, which give whole meal &
brown flours, their brown colour, are removed, resulting in the white flour, which is used to make fine textured
white bread. Much white bread is bleached chemically. White flour is available in strong, plain & self-raising forms.
Self-raising flour has a raising agent already blended with it..
4. Stone ground Flour :- Takes its name from the specific process of grinding used to produce it. The whole-
wheat grain is ground between two stones, one of which remains fixed while the other moves over it with the grain
in between. The process hits the flour slightly, giving it slightly roasted, nutty flavour. Both whole meal & brown
flours can be stone ground.
5. Granary Style Flour :- It is strong ground flour with added malted wheat flakes giving a nutty flavour. It is
in fact the brand name of a particular type of flour produced by the Rank Hovis McDougall plc., but the name is
often used to describe other granary style flour and bread made from them.
6. Organic Flour :- It is produced from wheat grown to strict standards of organic husbandry, in soil, which
has not been treated with artificial fertilizers for at least 2 years. No chemical pesticides, herbicides or artificial
fertilizers are used and the flour contains no additives. Both white and whole meal type of organic flours are
available.
SALT
It improves the flavour of bread. It should be measured accurately, as too little causes the dough to rise too
quickly & too muck kill the yeast & gives the bread n uneven texture. Salt is used in the proportion of 5-10 ml (1 -2
tsp) to 450 gm (I lb) of flour. Low sodium salt also is used.
FAT
Adding fat to the dough enriches it & gives a moist, close textured loaf with a soft crust. It also helps keep the
bread fresh & soft for longer. It is often rubbed into the flour & salt or if a large quantity is used, it is melted & added
with the liquid ingredients. If using margarine, block margarine is better than soft tub as it is easier to rub in. oil may
be used instead of fat.
LIQUID
Water is suitable for plain bread, producing a loaf with an even texture & crisp crust. Milk & water or milk
alone will give a softer golden crust & a loaf will stay softer & fresher for a longer period.
The amount of liquid used will vary according to the absorbency of the flour. Too much will give the bread a
spongy & open texture. Whole meal & brown flour are usually more absorbent than white.
The liquid is generally added to the yeast at a tepid temperature, that is 430 c (1100 f). Boiling water will kill
the yeast.
If a crusty finish is desired, bread or rolls can be brushed before baking with a glaze made by dissolving 10
ml salt in 30 ml water.
For a shiny finish, the surface should be brushed with beaten eggs or beaten egg & milk.
For a soft finish dust the bread or rolls with flour before baking. Some breads & yeast buns are glazed after
baking to give them a sticky finish. To do this, brush the bread with warmed honey or a syrup made by dissolving 30
ml sugar in 30 ml water & bring it to the boil.
There are many ways of adding interest variety & extra fibre & vitamins to bread & rolls. After glazing &
before baking, lightly sprinkle the surface with one of the following:
1) Poppy, caraway, celery or fennel seeds.
2) Sesame seeds — particularly good sprinkled on to the soft baps used with hamburgers.
3) Cracked wheat, barley or wheat flakes, sprinkled on top of whole meal breads or baps.
MAKING BREAD
Mixing the dough warmed ingredients & bowl will help to speed up the first rising process. Measure all the
ingredients carefully into large bowl. Add the yeast liquid & mixed with the dry ingredients, using a wooden spoon
or fork, until blended. Work the dough, using your hands, until the mixture is smooth & leaves the sides of the bowl
clean.
RAISING
The knead dough is now ready for rising. Unless otherwise stated in the recipe, place the dough in a bowl &
cover with a clean tea towel. This will prevent a skin forming during rising. Rising time vary with temperature.
Allow 1.5 to 2 hours at room temperature for the dough should have doubled in size & should spring back when
gently pressed with a lightly floured finger.
Good results are obtained by allowing the covered dough to rise in the refrigerator overnight or for up to 24
hours. The dough must be allowed to return to room temperature before it is shaped.
The dough can be made to rise in about 45-60 minutes in a warm place such as an airing cupboard or above a
warm cooker.
PREPARING TINS
While the dough is rising, grease the tins or baking sheets. Where reference is made to a 450 gm loaf tin,
capacity 90 ml, the approximate size to use in 16.5 X 10.5 cm top measurements & for 900 gm loaf tin, capacity 1.7
liters use 1 with 20X13 cm top measurements.
KNOCKING BACK
The best texture is obtained by kneading the dough for a second time after rising. Turn the risen dough onto a
lightly floured work surface & knead for 2 to 3 minutes to knock out any large bubbles & ensure an even texture. The
dough is then shaped as required, placed in the prepared tins or on baking sheets, covered with a clean tea towel &
left in a warm place to rise again.
This is the last process before baking. The shaped dough should be allowed to prove that is left at room
temperature until it has doubled in size & will spring back when lightly pressed with a floured finger. After proving
the dough is ready for glazing & baking.
BAKING
Basic breads are baked in the oven at 2300c (4500 f), mark & when cooked, the bread should be well risen &
golden brown & it should sound hollow when tapped underneath with the knuckles. Larger loaves may need to be
turned out of the tin & returned to the oven upside down for the last 10 to 15 minutes of the cooking time to ensure
they are cooked through. Allow to cool or wire racks.
TRADITIONAL BREAD & ROLL SHAPES
1) BA TON - Shape the dough into a long roll with tapering ends, about 20.5 cm (8 inches) long.
2) BLOOMER - Flatten the dough & roll up like a Swiss roll. Tuck the ends under & place on a baking sheet.
When proves to double its size, make diagonal slits on top with a sharp knife. Glaze the top with beaten egg
or salt water before baking.
3) COB - Knead the dough into a ball by drawing the sides down & tucking them underneath to make a smooth
top.
4) CO TTA GE - Cut 1/3rd off the dough. Knead both pieces well & shaped into rounds, place the smaller round
on top of the large one & place on a baking sheet. Make a hole down through the middle of both pieces using
the handle of a wooden spoon. Glaze with salt water before baking.
5) CROWN - Divide the dough into 50 gm pieces. Knead shape into rounds & placed in a greased round
sandwich tins. The crown is usually pulled apart into rolls when served.
6) KNOTS - Divide the dough into three, shape each piece into a thin roll & tie into a knot.
7) LOAF - Only fill the tin 2/3rd full for a perfect shape. Fold the dough in 3, smooth over the top & tuck in the
ends, then place in the tin.
8) PLAIT - Divide the dough into 3 & shape into long rolls about 30.5 cm (12 inches) long. Pinch the ends
together before baking, glaze with beaten egg & sprinkled with poppy seeds.
9) RINGS - Divide the dough into 3, shape each piece into a thin roll & bend it round to form a ring, dampen
the ends & mould them together.
10) ROUNDS - Divide the dough into 3, place the pieces on a very lightly floured surface & roll each into a ball.
To do this, to the hold hand flat almost at table level & move it round in a circular movement, gradually
lifting the palm to get a good round shape.
11) TIN - Roll out the dough to an oblong & roll up like a Swiss roll. Tuck the ends under & place in the prepared
tin. Before baking, score the top of the loaf with sharp knife if wished.
12) TREFOIL - Divide the dough into 3 & divide each piece into 3 smaller pieces. Roll each into a ball. Place
the 3 balls grouped together on a baking sheet.
13) TWIST - Divide the dough into 3 & divide each piece into 2. Shape into thin rolls. Hold one end of the 2
pieces of dough together & twist. Dampen the ends & tuck under.
BREADS
1. Brown or Wheat Meal Bread :- There are many different types of brown bread on the market and many
have added wheat germ or melted meal. The popular brands are usually made from branded flours, and are
sold wrapped or sliced for convenience. These are very useful for the sandwich maker who is in a hurry.
They can be bought in thin, medium and thick slices.
2. Whole meal Loaves :- Like the brown or wheat meal breads this variety can be bought almost anywhere.
These loaves are coarser than brown or wheat meal ones and contain important fibres and nutrients essential
to our- bodies.
3. Germ Breads :- These breads are baked from white or wheat meal flour with added wheat germ Hovis
being about the best-known variety.
4. Bran Loaves :- These are made from either brown or white flour or whole meal flour with added bran.
Nowadays, more people are conscious of the need to eat more bran in their diet for health and vitality. Bran
makes bread high in fibre content and gives a very pleasing light texture.
5. Granary Breads :- This bread has a high fibre content and is made from specially formulated flours which
are mixed with kibbled and whole grains. These loaves are normally bought unsliced and unwrapped, in
both tin and cob varieties. The tin variety is best for sandwich making because of its shape.
6. Soda Loaves :- These loaves are eaten in great deal in Ireland. They are baked with either brown or white
flour and are cooked with bicarbonate of soda or buttermilk instead of yeast.
7. Barrel Loaves :- This is an interesting shape to use for sandwich making as it has a number of close ridges
all the way across the crust which makes it easy to cut. It is also known by other names in different parts of
the country, such as Lodger's Loaf, Landlady's Loaf or Crinkled Musket.
8. Bloomer Loaves :- These are long, plumpish loaves, baton-shaped and have deep, diagonal slashes across
the top. They are sometimes known also as twists.
9. Batch Loaves :- As the name suggest, these loaves are baked in batches, lose together in the oven in one
wide tin so that their sides touch. When they are cooked they are then split apart so that they have no side
crusts.
10. Crusty Baton Loaves :- This is a long, thick, baton shaped loaf, much thicker and wider than a French
Stick. It usually has two slashes across the top crusts.
11. French Stick :- This is a long, thin loaf' with blunt ends and a crusty top. It has a long slash don the center.
12. Sandwich Loaves :- These are most commonly used for sandwich making, as the name suggests, as they
give even, square slices. They can be bought either brown or white, in thin, medium or thick slices, ready-
wrapped or unsliced and sold under many brand names. They are large, standard loaves, baked in a tin.
13. Split Tin Loaves :- These are usually white, long and thin with a slash from end to end along the top of the
crust.
14. Baps & Rolls :- These can be made from the same ingredients as used for bread making but made on a
smaller scale. Baps and Rolls are often easier to handle than large loaves for sandwich making as they are
easier to fill and to pack. You can use almost any type of filling including hot ones.
15. Rye Bread :- This is a very good for sandwich making with its rich, dark colour. It makes a pleasant contrast
with colorful ingredients and is a boon for the diet conscious. Rye bread is made with a mixture of rye and
wheat flours and often has a slightly sour taste about it, which, in fact, makes it rather delicate and unusual
testing bread. It is particularly good when eaten with smoked fish, cheese and salads. Rye bread keeps well
and can be used when it is quite stale as it still retains its moisture. It should be cut into wafer-thin slices and
can be used also to make canapes because of its cutting quality. Rye breads also freezes beautifully.
16. Pitta Bread :- This bread originally came from the eastern Mediterranean and has become very popular in
this county in recent years. It can be bought in most supermarkets, either fresh or frozen. It can take almost
any filling and makes a good, robust snack if filled with such things as hamburger, sausages, beans, bacon
and eggs, coleslaw and mixed salads. The combinations are endless.
BREAD FAULTS
There are a number of factors which may be responsible for creating faults in bread. However; some of the
major factors which adversely influence the quality of bread are as follows:
1. Inferior quality and inadequate quantity of gluten in the flour.
2. Poor or excessive diastasis activity.
3. Disproportionate quantities of raw material i.e imperfectly balanced formula.
4. Inferior quality of raw material specially yeast.
5. Incorrect time and temperature of fermentation.
6. Incorrect methods of manipulation of dough i.e knocking back, dividing and moulding.
7. Improper proofing conditions i.e time, temperature and humidity.
8. Improper baking conditions, i.e temperature, humidity and time.
9. Inadequate cooling of bread before packing.
10. Improper storage conditions.
11. A general lack of understanding of principles of hygiene on the part of baker.
A thorough knowledge about raw material and its functions, adequate understanding of bread making
procedures, necessary control on timing, temperatures and humidity conditions at different stages of bread making
and above all personal skill and experience of the baker goes a long way in avoiding faults in bread and also in
finding out remedy, should any fault occur. A skilled baker should examine the bread carefully, and by reasoning,
deductions, elimination, and if necessary, by experimentation, should be able to detect the cause of fault and
subsequently find the solution.
The overall quality of bread is dependent on the degree of perfection of its various characteristics like
volume, crust colour, flavour etc. These characteristics are influenced by various factors as follows:
Volume
Proper volume of bread is the outcome of adequate conditioning of gluten and sufficient gassing power of the dough
at the time of baking. For many reasons as listed below, if these two conditions are not fulfilled the volume remains
small.
1. Too tight a dough without commensurate adjustment in the yeast content and fermentation time.
2. Too little or excessive yeast content for the procedure followed.
3. Under fermentation of dough.
4. Too cold dough, or too cold temperature of fermentation room.
5. Crusting of dough at any stage of processing.
6. Excessive quantity of salt, sugar or fat in the formula.
7. Excessive temperature of the oven.
8. Under proofing of bread.
9. Lack of excessive diastasis activity in the flour.
10. High bran content in flour (ash content more than 0.5%)
11. Overuse of chemical bread improvers.
12. A badly over fermented dough.
13. Use of too weak or too strong flour.
14. Over mixed or under mixed dough.
15. Absence of fat in the dough.
Crust Colour
Crust colour is controlled by the amount of sugar present in the dough at the time of baking, presuming that the
bread is baked at right temperature. If for any reason, there is more activity of yeast, more sugar will be consumed by
yeast and bread will have a light, pale brown colour as in the following cases;
1. Excessive fermentation time given to dough.
2. Lack of salt in the dough.
3. Too slack a dough.
4. Excessive yeast for the process used.
5. Too high a dough temperature.
6. Too high a temperature of fermentation room.
7. Lack of sugar in the formula.
Some other reasons which, although, do not enhance the yeast activity, they do reduce the crust colour such as; low
diastasis capacity in the flour, crusting of bread during proofing and use of excessive dusting flour. Insufficient oven
temperature will certainly cause lack of crust colour.
Very often a sandwich bread may show dense layers on the outer periphery of the crumb specially near the top crust.
This happens because the expansion of dough (during baking) is restrained by the side walls or the cover of the
bread mould. Due to the pressure from expanding gas, the outer structure of bread is formed into dense layers. If the
cut surface of bread is observed, it could be clearly seen that the central part has a open soft structure while the outer
periphery has very close and compact structure. These dense layers are known as Seams.
Condensation Marks
If the bread is not allowed to cool properly before packing, some of the water vapours will deposit in the crumb
structure causing dark colour patches known as codensation marks. Bread should be thoroughly cooled before it is
packed.
Close Crumb
Milk has a tightening action on gluten and if it is used in the formula without compensating with enhanced quantity
of yeast, water and fat, the bread will develop a very close crumb. In plain white bread, excessive quantity of fat will
break down the crumb structure making it close and compact. Over use of potassium bromate or any other oxidising
agent will tighten up the crumb. Some other reasons are: Use of hard water, mould too small for the weight of dough,
young dough, under proofing, tight dough, and too high oven temperature.
Crumbliness of Crumb
When a dough is adequately fermented, the gluten strands develop elasticity and crumb also becomes elastic. If
there is no elasticity and crumb also becomes elastic. If there is no elasticity in the crumb, the bread will not slice
neatly and may break into fragments by the pressure of the slicer blades. This characteristic is known as crumbliness
of the crumb. Such a crumb will also break while applying butter to the slice. Crumbliness is almost always related
to the degree of fermentation given to the dough. Gluten of an under fermented dough will not be conditioned
adequately to develop elasticity while the gluten of over fermented dough will be weakened to the extent that there
is no elasticity left in it. Apart from the degree of fermentation, some other factors may also adversely affect the
elastic nature of crumb such as;
1. Too slack dough
2. Too tight dough (without due amendments in yeast content and length of fermentation time)
3. Excessive use of fat
4. Excessive use of mineral improvers.
5. Low salt content of the dough
6. Poor quality of flour
7. Undermixed dough
8. Under baked bread
9. Over proofing of bread
Leathery Crust
The crust of bread should be tender and should easily break when pulled. However, at times, for various reasons, a
crust becomes tough and leathery. This normally happens when a dough is under ripe or a strong flour is used
without making due amendments in fermentation time. In both the cases, the gluten will not be sufficiently
conditioned and will retain some of its toughness. Secondly, if, for any reason, the crust absorbs moisture unduly
either during baking or after baking, it will acquire leatheriness. Excessive humidity in proofing room and oven
should be avoided and bread should be thoroughly cooled before packing. Too slack a dough will produce
leatheriness of crust because adequate amount of moisture will not be baked off and some of it will be absorbed by
the crust causing the fault.
Sourness
Pleasant flavour and taste, developed as a result of fermentation, are considered to be very desirable characteristics
of bread. However; sourness in taste or flavour is not desirable. A strict control on the temperature of the dough and
fermentation room as well as on the fermentation period will allow only as much acid production as is desirable for
mellowing of gluten, and for developing the right strength of flavour in the product. However; if the dough temp. or
the temp.of fermentation room is undesirably high (more than 850F) or the period of fermentation is too long, the
yeast will work itself out, but the acid producing bacteria will still remain active thereby increasing the acidity in
dough and affecting the flavour and taste of the resultant bread. A bread, only slightly affected by rope (disease),
will also have sour smell (inspite of proper fermentation condition) but this smell will be nauseating and entirely
different from normal sourness which is caused by excessive fermentation.
Irregularity of Shape
While moulding bread by hand, an even pressure should be applied so that a moulded piece of dough has an even
oblong appearance. Expansion during proofing of such a piece of dough will be even and the resultant bread will
have regularity of shape. However; in case of loose moulding or moulding with uneven pressure, there will remain
large air pockets in the folds causing irregularity of shape. ln case of wood fired oven, normally, live coal is pushed
in one corner and left there while baking operation is carried on. The side of bread facing live coal should be
protected against fierce heat, either by covering the live coal or by covering the bread with some kind of protective
shield such as a baking tray. If protection is not given, the shape of bread will become irregular due to uneven
absorption of heat by bread. For the same reason, a small batch of bread should not be baked in a large oven without
due care (such as keeping a bowl of water in the oven prior to baking). Bread should always be set in the oven at an
even distance from, and parallel to, each other in order to ensure even absorption of heat by each unit of bread. A
badly loaded oven will affect the regularity of shape.
Since hearth type products (like French bread, Vienna bread) are baked directly (without mould) on the hearth of the
oven, their expansion is not guided by the side walls of the mould as in the case of pan bread. Such products should
be docked or scored prior to baking, so that the expanding gas may escape through these openings without affecting
the regularity of shape of the product. In case of insufficient or absence of docking, the expanding gas may create
bulges at the weaker spots spoiling the shape of the product.
Blisters
If bread is proofed in excessive humidity, the moisture deposits on the surface of bread in the form of small droplets.
Due to this increase in the moisture content, the gluten of the affected spot acquires more stretchability just as it will
happen in the case of slack dough. Such spots form blisters under the pressure of expanding gas during baking
operation. In case of moulding by machine, if the pressure board is adjusted too closely, the moulding will be too
tight and some air bubbles will get entrapped on the surface under a very thin film of gluten. These air bubbles will
expand during proofing as well as during baking causing blisters. Other reasons for having blisters are; very slack
dough, loose moulding, under fermented dough, excessive top heat in oven.
Deficiency of Bloom
Bloom could be affected by a number of factors like quality of raw material, faulty formulation, inadequate
fermentation, faulty conditions during proofing and baking and so on. Allowing rest of the conditions to be
adequate, the most important factor responsible for imparting bloom to bread is the diastasis capacity of flour.
Sufficient sugar production and formation of dextrin during baking operation impart this desirable characteristic to
bread. If the flour is deficient in diastase, it should be supplemented with addition of malt to remedy this defect. Malt
flour can also be useful and can be made by the baker.
Over baking of bread will invariably result in bread having thick crust or if oven is cool, the bread has to be baked for
longer time which will produce thick crust.