Beat egg whites into snow. Mix egg yolks with sugar, water and oil until foamy, then stir in flour, baking powder and cocoa and fold in the egg whites. Pour into a springform pan and bake at around 180 degrees for 20 minutes. Then let it cool down.
For the cream, whip up the whipped cream and stir in the Dany & Sahne, spread on the cooled base and sprinkle with chocolate flakes.