Monster cupcakes

250g self-raising flour
25g cocoa powder
175g light muscovado sugar
85g unsalted butter,melted
5 tbsp oil
150g pot fat-free natural yoghurt
1 tsp vanilla extract
3 large eggs

For the frosting and decorating

85g unsalted-butter,softened
1 tbsp milk
1/2 tsp vinilla extract
200g icing sugar
food colourings
sweets and sprinkles,to decorate

Heat oven to 190c/170c fan/gas 5 and line a 12 hole muffin tin with deep cake cases.Put all the cake ingredients into a bowl and mix until smooth.Spoon into the cases,Then bake for 20 min until risen and golden.Cool completely on a rack.For the frosting,work the butter,milk and vinilla into the icing sugar until creamy and pale.Colour with food colouring.Then create your own gruesome monster faces using sweets and sprinkles.