A simple sponge cake is a soft cake that can be eaten any time; it is also used as the base for various flavored icing cakes. Usually, the simple spongy cake recipe is vanilla flavored, but many people prefer adding other fruit flavors like chocolate, orange, strawberry, etc. The ingredients required to make simple sponge cake recipe include eggs, flour, margarine, caster sugar and baking powder. Apart from the flour, sugar and margarine need to be blended well. This simple sponge cake can be topped with a butter cream icing and served.