Sponge cake is a cake based on flour (usually wheat flour), sugar, and eggs, sometimes leavened with baking powder which has a firm, yet well aerated structure, similar to a sea sponge.
Sponge cake is a cake based on flour (usually wheat flour), sugar, and eggs. Eggs are sometimes leavened with baking powder which has a firm, yet well aerated structure sponge. This was similar to a sea.