Easiest recipe - and tastiest - by far!:
6oz s/r flour, caster sugar & stork (trust me - already soft and doesn't have strong taste like butter. Once you try it for both cakes and buttercream you'll never go back. Even people who "don't like buttercream" love it)
3 eggs
1 tsp vanilla essence
cream stork & sugar, add eggs, then fold in flour.
Bake for 15-20 mins at gas 4
For buttercream, do it by eye/by taste but rule of thumb is double amount of icing sugar to stork, then tsp or 2 of vanilla.