Mix flour, baking powder and baking soda. Whisk the egg. Stir in sugar, vanilla sugar, butter and 250 ml buttermilk. Carefully fold in the flour mixture. Halve the dough. Stir 2 tbsp.
cocoa and 2 tbsp. buttermilk into one half. Line a muffin tray with 12 paper cups. First spread the light-coloured dough in them, then the dark dough. Pull through spirally with a wooden skewer. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 25 minutes. Let muffins rest for about 5 minutes. Carefully remove from the tray. Let them cool down. Whip 3 tbsp. cocoa, 3 tbsp. sugar and cream cheese with the whisk of the hand mixer for approx. 3 minutes.
Let muffins rest for about 5 minutes. Carefully remove from the tray. Let them cool down. Whip 3 tbsp. cocoa, 3 tbsp. sugar and cream cheese with the whisk of the hand mixer for approx. 3 minutes. Spread the muffins with chocolate-cheese mixture. Dust with the remaining cocoa
Waiting time approx. 1 hour