For the base, first mix the margarine, sugar and eggs for about 5 minutes until foamy

Sift the flour and baking powder and fold in with the hazelnut flour

Preheat the oven to 200 ° C; Bake the cake on the lower rack for about 30 minutes at 180 ° C top and bottom heat; let cool down completely

Coarsely grate the apples through a grater with large holes; with sugar, eggs, lemon juice and pudding powder, bring to the boil while stirring constantly and simmer for 5 minutes (switch off the oven)

Now stir in the cinnamon and remove the mixture from the stove and let it cool for at least 15 minutes; now put on the floor and refrigerate

Just before serving, whip the cream until stiff and spread it on the cake; Dust with cocoa and serve immediately