Mix butter and sugar till light and fluffy(preheat oven) sift your flour,baking powder,soda,and milk. After the butter and sugar have been mixed,add eggs one by one and mix add in vanilla flavour and mix. Then fold in flour mixture, and mix well,

Grease baking pans and tap gently to release air bubbles in the batter and bake in preheated oven. Baking time depending on the type of oven you are using. If cake is done,insert a toothpick and when it comes out clean then your cake is done.

Do note open your oven unnecessarily, your cake might fall,if it's in the process of raising.

In a mixing bowl mixed together icing sugar and butter until softened, add in vanilla essence and milk mix well until soft and your frosting is ready to be frosted on cake take small to add green colour and another one for blue colour then decorate your cake then pour some candy on.