To make a sponge cake you will be required to make a mixture of eggs, margarine, baking powder, flour and sugar. After baking you can tell a layer is cooked by pressing lightly on the centre; if it springs back up it is ready.
1. Preheat the oven to 375 degrees F. Spray the baking pans with cooking spray and set aside. 2. Prepare the batter. Cream the butter with a low-speed mixer and add the white sugar 1/4 cup at a time. Mix together until light and fluffy. 3. Add eggs www.ehow.com