Sprinkle Cupcake

I got a brand new electric mixer for my birthday, so I tried it out today with some cupcakes. It is one beautiful machine, that mixer!Here's the recipe for the cupcakes. It is originally for a cake, but I simply divided the batter into a cupcake pan with paper cupcake cups.Ingredients125g butter, softened3/4 cup caster sugar1 teaspoon vanilla essence2 eggs300g self raising flour, sifted3/4 cup milkPreparationPreheat oven to 180 degrees Celcius.Using an electric mixer, beat butter and sugar until light and fluffy.Add vanilla essence. Add eggs one at a time; beat well after each addition.Slowly add flour and milk alternately to form a smooth batter.Divide mixture evenly into two lightly greased and lined 20cm round cake pans, or one deep 22cm round cake pan. If making cupcakes, divide the batter into lined 12-cup cupcake pan.Bake for 45-50 minutes for cake, or 20-30 minutes for cupcakes. Cake is done when golden on top, or when toothpick inserted in centre comes out clean. Turn out onto wire rack to cool.Icing Ingredients(I halved this recipe and ended up with just enough to ice the cupcakes - if you want to make a layer cake I'd recommend making the full recipe)2 tablespoons cocoa1/2 cup boiling water40g butter, melted1/2 teaspoon vanilla essence2 1/2 cups icing sugar, siftedMulticolored sprinkles - optionalPreparationDissolve cocoa in the boiling water, stir in melted butter and vanilla essence.Gradually add sifted icing sugar and stir until mixture is smooth and well combined. Spread onto cake and toss on some sprinkles.It is a soft icing, but will harden slightly after sitting.