Place the cherries on a sieve and drain well. Dice the marzipan. Mix flour, sugar, baking powder and salt in a bowl. Add marzipan and softened butter in pieces. Add 2 eggs and knead everything into crumbles with your hands.
Grease the fat pan of the oven (approx. 32 x 39 cm) and dust with flour. Put approx. 2/3 crumbled dough into the fat pan and press it down to a smooth base. Spread cherries on top. Mix sour cream, poppy seed filling, 6 eggs and pudding powder.
Spread the mixture evenly on the cherries. Spread the rest of the crumble on top. Bake in the preheated oven, second shelf from below (electric oven: 175 °C/ convection oven: 150 °C/ gas: stage 2) for about 1 hour.
After 40-45 minutes, turn up the oven temperature (electric oven: 200 °C/ circulating air: 175 °C/ gas: level 3) and bake in 15-20 minutes. Let the cake cool down in the fat pan and cut into pieces.
Whipped cream tastes good with it.