Preheat the oven to 200 C / Gas 6. Line two 12 hole muffin tins with paper cases.
In a mixing bowl beat together the butter and sugar until fluffy, then add the eggs, one at a time and beat until creamy. Add the vanilla extract then fold in the flour until well incorporated. Spoon the mixture into the prepared paper cases filling only 3/4 full to ensure a good rise.
Bake in the preheated oven to 10 minutes, until a skewer inserted into the centre comes out clean. Once baked, remove from the oven, let cool then decorate. Enjoy!!