Cream fat and sugar with the whisk of the hand mixer. Stir in the eggs one after the other. Mix flour and baking powder and stir into the dough alternating with buttermilk
Grease a fat pan (approx. 32 x 39 cm) and dust with flour. Spread dough on it. Drain the peaches and cut in half. Sort blueberries, wash and drain. Spread peaches and blueberries on the dough
Bake the cake in the preheated oven (electric cooker: 200 °C/ circulating air: 175 °C / gas: level 3) for 30-40 minutes. Let it cool down. Serve with sour cream or whipped cream