Wash, clean and stone the cherries. For the crumbles, mix flour, baking powder, sugar, vanilla sugar and 1 pinch of salt in a large mixing bowl. Coarsely grate the marzipan. Add 250 g butter in pieces and 1 egg. First use the dough hooks of the mixer, then briefly work into crumbles with your hands.
Approx. 2⁄3 Spread the crumble into a well greased spring plate (top 30 cm Ø, 6 cm high). Press down as a base, while pulling up an approx. 3 cm high edge. Sprinkle with breadcrumbs and spread the cherries on top.
For the icing, stir sour cream, 6 eggs, pudding powder and "poppy seed bake" until smooth. Spread evenly on the cherries and smooth down.
Sprinkle remaining sprinkles over the cast. Bake the cake in a preheated oven (electric oven: 175 °C/circulating air: 150 °C/gas: see manufacturer) on the lowest rack for approx. 1 1⁄4 hours. If necessary, cover with aluminium foil about 15 minutes before the end of the baking time. Let the cake cool down. Dust with icing sugar. Whipped cream tastes good with it.
If you do not have fresh fruit to hand, this simple conversion applies: 500 g fresh cherries = 1 jar (720 ml) pickled cherries