Cream the fat, 150 g sugar and 1 sachet of vanillin sugar. Stir in the eggs one after the other. Mix flour and baking powder and stir into the fat-egg mixture alternately with the milk. Grease a baking tray (32 x 39 cm). Spread the dough evenly on it. Sprinkle with oat flakes and hazelnut brittle.
Bake in the preheated oven (electric cooker: 175°C/ convection oven: 150 °C/ gas: level 2) for 15-20 minutes. Let the cake cool down. Soak the gelatine. Mix yoghurt, 1 packet of vanillin sugar, grape juice and 75 g sugar. Squeeze the gelatine, dissolve and mix with 5 tbsp. yoghurt. Then stir into the remaining cream and chill. Wash the grapes, dab dry, pluck off the stalks and cut into quarters. Quarter the cake. Cut quarter into shape (approx. 15 x 17 cm). Place firm aluminium foil rails around 2 bases. Whip cream until stiff.
Then stir into the remaining cream and chill. Wash the grapes, dab dry, pluck off the stalks and cut into quarters. Quarter the cake. Cut quarter into shape (approx. 15 x 17 cm). Place firm aluminium foil rails around 2 bases. Whip cream until stiff. As soon as the yoghurt starts to gel, fold in the cream. Carefully fold in grapes. Spread the cream over the cake layers. Place the remaining cake layers on top and press down lightly. Chill the cake for about 4 hours. Cut each cake into quarters and halve diagonally
As soon as the yoghurt starts to gel, fold in the cream. Carefully fold in grapes. Spread the cream over the cake layers. Place the remaining cake layers on top and press down lightly. Chill the cake for about 4 hours. Cut each cake into quarters and halve diagonally
waiting time 4 1/2 hours