Knead the dough ingredients until they are smooth and wrap in foil and leave to rest in the refrigerator for approx. 1 hour. For the filling, bring the milk to the boil and let the rice soak in it over a low heat for about 40 minutes. Remove from heat and let cool in about 1 hour, stirring frequently.
Beat eggs with sugar, vanilla sugar and lemon flavor until frothy. Stir in the custard powder and cream cheese. Then add rice pudding and butter.
Roll out the dough the size of a baking sheet on a floured work surface and place it on the baking sheet lined with baking paper.
Spread the rice cream on top. Bake the cake in a preheated oven at 180 ° C for approx. 45 minutes. Then let it cool for about 1 hour.
Dust the cake with cocoa powder like a lattice or whole.