Knead a shortcrust pastry from the ingredients for the dough (butter to baking powder), place in a greased springform pan and pull up the edge. Spread the grated apples on top. For the topping, mix the sugar, vanilla sugar and custard powder with a little wine and bring the remaining wine to the boil. Add the pudding powder and bring to the boil briefly. Pour the topping over the apples and bake the cake at 180 ° C for about 90 minutes. To let it cool down. Spread 400 ml of whipped cream on top and decorate with sifted cocoa.