Is there any eggs in sponge cakes?

Yes, traditional sponge cakes do contain eggs. They are a crucial ingredient for the cake's structure and texture.

Here's why:

* Structure: Eggs provide the protein that sets and creates the airy structure of the sponge cake.

* Texture: The egg whites, when whipped, incorporate air and create a light and fluffy texture. The egg yolks add richness and moisture.

However, there are egg-free sponge cake recipes available for those with allergies or dietary restrictions. These often use alternatives like applesauce, mashed bananas, or flaxseed meal.