Sponge cakes are special because they are light and fluffy. This fluffy texture comes from using whipped eggs. Here are some important points about sponge cakes:

• Egg Use: Sponge cakes need lots of beaten eggs to help them rise. On the other hand, butter cakes use a mix of creamed butter and sugar to get their lift.
• Texture: This process creates a soft and spongy cake. It's great for desserts like ladyfingers or tiramisu.
• Fat Levels: Sponge cakes usually don't have much added fat. In contrast, butter cakes are rich and heavy.

Because of these features, sponge cakes are great for layering with creams and fruits!