Make a batter from butter, 125 g sugar, 3 eggs, nuts, flour, baking powder and cinnamon and bake at 160 ° C for about 30 minutes. This can also be done the day before.
Bring the grated apples with the sugar, the remaining 2 eggs, the lemon juice and the pudding powder to the boil, stirring constantly. Let cool down a little, then spread on the cake base lying in a springform pan. Put in a cool place.
Whip the cream until stiff, distribute it on the cake and smooth it out. Sift some cocoa powder over it.