As a caterer, I can assure you these muffins are my all-time favorite! The orange and dates are easily chopped in a food processor, but I don't recommend using a blender. You can also chop them quite finely (1/4 inch pieces) by hand. I love the flavour if orange, so I use orange juice instead of milk. If your oven is quite hot, bake at 375F for 20 minutes. (I normally use cupcake liners, but it's not required.)