Crustless Spinach Quiche

Ingredients & Substitutions

Here I explain the best ingredients for my easy crustless spinach quiche recipe, what each one does, and substitution options. For measurements, see the recipe card.

• Olive Oil – Use your favorite extra-virgin olive oil, or any neutral cooking oil. Avocado oil would work as well.
• Onion – I used a yellow onion, but a white onion would work as well.
• Garlic – Fresh garlic gives the best flavor, but you could substitute 2 teaspoons jarred minced garlic or 1/2 teaspoon garlic powder for convenience.
• Fresh Spinach – I prefer a quiche with fresh spinach, but you could use frozen spinach instead. If using frozen spinach, you need to thaw it first, drain the excess water, and then proceed with step two in the recipe. The amount needed would be 20 ounces of frozen spinach, which, once thawed, measures almost 2 cups. Use any leftover spinach to make a spinach smoothie to go with your quiche.
• Eggs – Room temperature eggs work best in baking. Set the eggs on the counter for about 30 minutes before using, or if you forget, submerge them in warm water for a few minutes to bring to room temp.
• Heavy Cream – You’ll get the richest texture with cream, but you can also use whole milk, or plain almond milk or canned coconut milk for dairy free options.
• Sea Salt & Black Pepper
• Baking Powder – Although optional, I recommend using baking powder for a fluffier quiche.
• Cheese – I used a combination of Swiss cheese and cheddar cheese in this recipe for spinach quiche. See more cheese ideas below. (You can substitute a vegan cheese alternative if you need a dairy-free option.)

How To Make Spinach Quiche

I have step-by-step photos here to help you visualize the recipe. For full instructions with amounts and temperatures, see the recipe card.

1. Prep. Preheat the oven. Chop the spinach, garlic, and onion.
2. Saute the aromatics. Heat the olive oil in a large skillet. Add chopped onion and sauté until translucent. Combine onions with minced garlic and saute until fragrant.
3. Cook the spinach. Add spinach and stir until soft.

3. Whisk the egg base. In a large bowl, whisk eggs. Add heavy cream, salt, pepper, and baking powder (if using). Whisk to combine.
4. Add cheese. Stir the shredded cheese into the egg mixture.

5. Combine. Stir in the spinach mixture from the skillet into the egg mixture, then pour everything into a 9-inch pie plate or baking dish.
6. Bake. Place the spinach quiche recipe in the oven and bake until set.

Recipe Variations

• Make A Crust – For a delicious twist on this classic spinach quiche, try this recipe with your favorite savory pie crust. I like almond flour pie crust or coconut flour pie crust, but any kind you like will work. Par baking it first will ensure it doesn’t become soggy. To allow for the perfect amount of filling, reduce the number of eggs by 1 and lower the amount of cream to 1/4 cup.
• Spinach And Mushroom Quiche – If you want a heartier quiche, add 8 ounces sliced fresh mushrooms of your choice (try cremini, shiitake, button and/or oyster mushrooms). Cook them in the skillet after the onions and before adding the spinach.
• Add Protein – If you want to add a protein to this crustless spinach quiche, try bacon. Make bacon in the oven, slices of air fryer bacon, or quick microwave bacon and break it up into small pieces to create a spinach bacon quiche. Or, add some diced ham to make a ham and spinach quiche. Ground sausage, similar to my sausage egg muffins, would also work well.
• Swap Cheeses – I used a combination of Swiss cheese and cheddar cheese for this spinach quiche recipe, but you can try feta (a spinach and feta quiche would be delicious), Gruyère, parmesan cheese, or mozzarella. Soft or hard cheeses both work great.
• Use Other Veggies – Replace up to 1 1/2 cups of the spinach with other cooked vegetables. Try roasted asparagus, leftover caramelized onions, small pieces of roasted broccoli, or a few cubes of roasted sweet potatoes.

Serving Ideas

Crustless spinach quiche is perfect on its own, but can be served with a variety of brunch sides as well. Here are a few ideas:

• Salads – Grilled peach salad, sweet pear salad, or a light strawberry spinach salad all pair well with a spinach quiche recipe.
• Breakfast Meats – Cook up simple air fryer sausage, homemade salmon lox, or a few slices of air fryer turkey bacon for a savory meal.
• Sides – Try brunch sides such as cauliflower hash browns, cheesy asparagus casserole, creamy coconut yogurt, hearty protein waffles, or even fresh fruit!
• Muffins – Make your brunch complete with some scrumptious healthy zucchini muffins.

More Breakfast Meal Recipes

If you liked this crustless quiche recipe, try some of these other easy breakfast recipes:

Crustless Zucchini Quiche

Frittata Recipe

Instant Pot Crustless Quiche

Breakfast Casserole Recipe

My Tools For This Recipe

• Large Skillet – This is the perfect durable skillet for sauteeing, as it is non-stick and conducts heat well.
• Pie Plate – A shallow pie plate like this one works best for this spinach quiche recipe, but you could also use a round 9-inch baking dish (or 8-inch square baking dish) as well. Baking times may vary.