Put flour, 125 g sugar, cinnamon, 1 packet vanilla sugar, 175 g butter in flakes, 1 egg and salt in a bowl. First knead into crumbles with the dough hooks of the hand mixer, then with your hands. Grease a springform pan (26 cm Ø). Put about half of the sprinkles in the form and press it to a smooth bottom, put it in a cold place. Melt 100 g butter, let it cool down a little. Mix curd, sour cream, 200 g sugar and 1 packet of vanilla sugar with the whisks of the hand mixer until smooth. Stir in 4 eggs, cream and lemon zest one after the other.
Stir in pudding powder and finally stir in butter. Spread the plum puree on the base, leaving an approx. 1 cm wide rim free. Add the cheese mixture and smooth it down. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) on the lower rack for 50-60 minutes. After about 25 minutes of baking time, spread the remaining crumbles on top. Let rest for 10 minutes with the oven door open. Cool down on a cake rack
waiting time approx. 3 hours