Wash the peaches, carve them crosswise and blanch them with boiling water for 1-2 minutes. Rinse the peaches briefly under cold water and peel the skin. Cut peaches in half, remove stones and cut the halves into thick slices.
Sprinkle with lemon juice. Sort the blackberries, wash them carefully and let them drip off well on kitchen paper. Cream fat and 200 g sugar. Stir in 4 eggs one after the other. Add bitter almond oil and amaretto.
Mix flour, cornstarch and baking powder and finally stir in briefly. Spread the dough on a greased baking tray (32x38 cm) and spread the fruits on top. Mix sour cream, sauce powder, remaining eggs and sugar.
Pour evenly over the fruit and sprinkle with flaked almonds. Bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for 35-40 minutes. Let the cake cool down and cut into approx. 20 pieces.