First things first is a simple sponge cake. I use my Grandmother's recipe (apparently!) whereby I weigh the eggs and use the same quantities of egg, butter, sugar and self raising flour. For me, it is completely fool proof. When making a chocolate sponge as below, I measure a little less flour and make it up with a good quality cocoa. I like the Green and Blacks cocoa, yum yum!
Spread the mixture into a shallow rectangular tin/tray and bake for around 15-20 minutes on 180oC .
I used 25g butter and 150g icing sugar which I beat with the Kitchenaid. Once that resembled breadcrumbs, add 125g of cream cheese. Beat until smooth and creamy but not runny.