Place 2 paper cups inside each other and place them in the recesses of a muffin tray (for 12 pieces). Finely chop 10 balls
Mix eggs, sour cream, oil, sugar, vanillin sugar and 1 pinch of salt briefly. Mix flour and baking powder, stir in portions briefly. Fold in chopped balls. Pour into the moulds.
Spread 20 balls on top and press them gently into the dough. Bake in the preheated oven (electric oven: 175 °C/circulating air:150 °C/gas: level 2) for about 25 minutes. Cool down. Dust with icing sugar