Whip whites, add sugar and whip. Then add yolks and whip. Add flour and potato flour. Add baking powder. Mix gently. Pour cake into greased form and bake 30 minutes in 340 degrees F (170 degrees C). Cool it down. Divide cake on 3 parts. Pour every of them using creamy aroma mixed with water.
Boil milk. Mix eggs, sugar and custard. Add mixture to milk. Boil. Cool it down.
Beat margarine, add step by step cold mixture with milk. 1/3 of filling put into other bowl and rest mix with cocoa.
Smear cocoa mixture on first part of cake. Put second part on it. Smear white mixture (without cocoa). On mixture put third part of cake.
Melt gelatine in 4 tablespoons of hot water. Cool it down. Beat cold cream with powdered sugar. Add gelatine. Mix. Use cream with gelatine to decorate layer cake. Then cool it down layer cake in fridge.
Bon appetite! | 
