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
1. Sift the flour and baking powder, using a sift. Ad. 2. Add the sugar in the baking powder and flour. 3. Make sure the butter is at room temperature and beat that in with an electric whisk. 4. Add the two eggs, again using the electric whisk. And www.wikihow.com