Separate four eggs. Cream fat. Gradually add sugar, vanillin sugar, 2 whole eggs, egg yolk and rum and beat until foamy. Mix starch, baking powder and flour. Add to the dough by the spoonful.
Beat egg whites until stiff and fold in carefully. Line the bottom of a springform pan (20 cm Ø) with baking paper and spread a tablespoon of dough on top. Bake under the preheated grill for 1-2 minutes. Then spread another 1 tablespoon of dough on top and bake. Process the whole dough in this way. Carefully remove the cake from the edge with a knife, turn it onto a cake rack and let it cool down. Melt the chocolate coating in a hot water bath, let it cool down a little and cover the cake with it. Let it set. Melt the white couverture as well. Spread on a cooled marble board and let it set in the fridge.
Carefully remove the cake from the edge with a knife, turn it onto a cake rack and let it cool down. Melt the chocolate coating in a hot water bath, let it cool down a little and cover the cake with it. Let it set. Melt the white couverture as well. Spread on a cooled marble board and let it set in the fridge. Use a spatula to scrape the rolls and garnish the cake with them. Dust with cocoa
Waiting time approx. 2 hours