INGREDIENTS
6 tablespoons of cocoa powder
3 tablespoons of boiling water
225 g of softened unsalted butter
225 g of caster sugar
4 large eggs
225 g of self-raising flour
2 level teaspoons of baking powder
500 g of mascarpone
200 g of dark chocolate (70% cocoa solids)
1 tablespoon of icing sugar