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. Bake a cake in a 9"by-13" baking pan. You can use a store-bought cake mix; follow the box directions and allow the cake to cool completely. 2. Cover a 14"by-20" cardboard cake board in aluminum foil. You can purchase cake boards at your local www.ehow.com
150g flour. 1 level teaspoon of baking powder. 150g caster sugar. 150g butter. 4 eggs. Preparation method. Preheat the oven to 180C/350F/Gas 4. Grease and line 2 x 18cm/7in cake tins with baking paper. Technique: Greasing and lining cake tins. Watch wiki.answers.com