What is a sponge cake?
A sponge cake is a cake with no added fat, but uses both the egg yolk, and egg white separate. A sponge cake is leavened by a mechanical leavening agent, beating air into the egg whites. This cake is very light and soft, with a spongy consistency, that is how it gets its name.
What is an example of a sponge cake?
One example of a sponge cake is Strawberry Sponge Cake. In a strawberry sponge cake, you beat egg whites with sugar, and incorporate yolks one at a time. Because you beat the white with sugar and add in yolks, it is classified as a sponge cake.