Knead 150 g butter, 150 g sugar, vanillin sugar, flour and 1 pinch of salt with the dough hooks of the hand mixer. Then work into crumbles with floured hands. Grease the bottom of a springform pan (26 cm Ø). Fill in half of the crumbles and press them with your hands to a smooth base, chill. Beat 100 g butter and 125 g sugar until frothy. Stir in the eggs one after the other.
Stir in quark, mascarpone, nut nougat cream and pudding powder. Spread the mascarpone-nougat mixture on the crumble base until smooth. Knead remaining crumbles, pistachios and hazelnuts and spread evenly on the mascarpone mass. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for 70-75 minutes. Let cool slightly and remove from the tin. Decorate with biscuits and lemon balm