Preheat the oven to 180C/350F/Gas 4.
Cream the butter and the sugar together until light and fluffy. Add your chosen flavoring of lemon zest cocoa or vanilla.
Add the whisked egg to the mixture. Slowly fold in the self-raising flour and spoon the mixture into paper cases sitting in a bun tin.
Cook for approximately 10 minutes until risen and bouncy to touch.
Decorate with icing in pale colours eg white, pink, blue and yellow.