6 tablespoons sweet butter, melted (plus extra for greasing)
3 1/2 cups all-purpose flour(plus extra for dusting)
2 teaspoons baking powder
scant 1/2 cup superfine sugar
3/4 cup milk
1/4 cup unsweetened cocoa powder
confectioner's sugar, for sprinkling
Preheat oven 350 degrees F.
Grease a ring mold with butter and lightly dust with flour.
Sift together the four, baking powder, sugar and a pinch of salt into a bowl.
Add the eggs, melted butter and milk and mix until smooth and even.
Pour one-third of the mixture into another bowl and stir in the cocoa powder.
Pour the plain mixture into the prepared mold, then pour the cocoa mixture on top.
Bake 35-40 minutes.
Remove from the oven and let stand for 15 minutes, then turn out.
Sprinkle with confectioner's sugar and serve.