Preheat the oven to 180 °C (convection oven).
Preheat the oven to 180 °C (convection oven).
Mix the QimiQ Sauce Base with the melted butter, egg yolks and vanilla sugar.
Sift the baking powder with the flour and quickly fold into the QimiQ mixture. Carefully fold in the whisked egg whites.
Sift the cocoa powder and carefully fold into half of the mixture. Pour the pale and dark mixtures alternately into a greased and sugared cake tin. Create a marbled effect by running a fork through the mixture.
Bake in the middle of the preheated oven for approx. 40-45 minutes.
Tip: Cover with chocolate glaze.