I made this the other night and oh my gosh it is sooooo good. Really easy and quick to make too, though probably not so good for the waistline
50g butter
1 1/2 cups flour
2 teaspoons baking powder
1 cup castor sugar
3 tablespoons cocoa
1/3 cup milk
2 teaspoons vanilla essence
3/4 cup brown sugar
5 tablespoons cocoa
2 cups boiling water
Melt the butter in a medium sized microwave proof pudding bowl. Stir in flour, baking powder, sugar, first measure of cocoa, milk and vanilla. Do not overbeat. Mix brown sugar and second measure of cocoa together. Sprinkle over mixture in bowl.
Carefully pour the boiling water over. Cook in microwave, uncovered, on High for 12-14 mins, until centre is just cooked. Allow to stand for 5 mins before serving.