Cream fat, 75 g sugar and vanillin sugar. Stir in egg. Mix flour and baking powder and also stir in
Grease a springform pan (26 cm Ø). Fill in the dough and smooth it down. Bake in the preheated oven (electric cooker: 175 °C / convection oven: 150 °C / gas: level 2) for 25-30 minutes. Allow to cool down
Whip the cake aid and 1/2 l water for 3 minutes until frothy. Wash 1 orange hot, rub peel onto the mixture. Add the quark in four portions to the mixture and stir in briefly. Whip cream until stiff and carefully fold in with a whisk
Pour the curd mixture into the mould and smooth it down. Chill the cake for 3-4 hours
Peel oranges thickly, cut into slices. Put them on the quark mixture. Mix 2 tablespoons of sugar and icing powder in a pot. Add 1/4 l water bit by bit and bring to the boil. Spread the icing on the cake and let it set. Loosen the rim of the mould