Whip whipes, add sugar and still whip. Add yolks, mix. Then add flour, baking powder and cocoa. Mix gently.
Pour cake into greased form (10x14 inches; 25x36 centimeters). Put into oven and bake 25 minutes in 340 degrees F (170 degrees C). Then cool down and divide on two parts.
Boil milk with sugar and vanilla sugar. Cool down. Cream margarine and add milk with sugars and powdered milk, mix.
On first part of cake put milk mixture. Put second part of sponge cake on it.
Melt chocolate with milk, use to decorate the top of cake.
Cool down in fridge.
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