Start by whipping the eggs with the sugar until the mixture is light and frothy. Add the mascarpone and continue mixing until it is completely combined.
Sift together the flour , bitter cocoa and baking powder to avoid lumps and gradually add them to the egg and mascarpone mixture. Mix gently with movements from the bottom up.
Pour the mixture into a greased and floured pan and bake in a preheated oven at 180°C for about 30-35 minutes. Check the cooking with a toothpick.
