Bone and ghost layer cake
For the 3 layer cakes
250g butter, at room temperature
250g caster sugar
4 eggs
250g flour
25g cocoa powder
2 tsp baking powder
80ml milk
For the buttercream frosting
200g unsalted butter, softened
425g icing sugar, sifted
25g cocoa powder
1 tsp vanilla extract
2 tbsp milk
For the bones and ghosts decorations
2 large egg whites, at room temperature
1/8 tsp cream of tartar
90g sugar
15g chocolate, melted
Chocolate sprinkles