Defrost raspberries at room temperature. Melt butter. Grind the biscuits finely in the universal chopper and mix with the butter. Spread them on the bottom of a springform pan (22 cm Ø), pressing lightly
Pass the raspberries through a sieve. Bring raspberry puree and 50 g sugar to the boil and boil down for about 5 minutes
Cream cheese, sour cream, eggs, 250 g sugar and vanillin sugar with the whisks of the hand mixer. Spread the cheese mixture on the biscuit base and smooth it down. Spread the raspberry mixture over the cheese mixture
Bake in the preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: see manufacturer) for approx. 20 minutes. Reduce the temperature (electric oven: 125 °C/ convection oven: 100 °C/ gas: see manufacturer) and bake for another 1 1/2 hours. Leave the cake to cool in the switched off oven and put it in a cool place for at least 1 hour (better over night)
waiting time approx. 3 hours