Separate eggs. Beat egg whites and 3 tbsp. water until stiff. Add 150 g sugar. Fold in egg yolks one after the other. Mix flour and baking powder, sieve onto the egg cream and fold in
Line the bottom of a square springform pan (24 x 24 cm) with baking paper. Fill in sponge cake mixture and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 15-20 minutes. Let it cool down on a cake rack
Mix the quark and 2 tablespoons of sugar. Whip the sour cream with the whisk of the hand mixer for about 3 minutes and fold into the quark cream. Sort raspberries
Remove the cake from the tin and remove the baking paper. Spread the jam on the base. Spread about 350 g raspberries on top. Spread the cream carefully on the raspberries with the help of a tablespoon. Spread the rest of the raspberries on the cream. Chill the cake for about 30 minutes and dust with cocoa powder
Waiting time approx. 1 1/2 hours. / 2 BE