Pour flour into a bowl, add cocoa, vanilla sugar and sugar, mix. Pour milk, add eggs and mix into a uniform batter. Add melted, slightly warm butter and mix again. Set aside for at least 10 minutes.
Use a ladle to scoop a portion of batter and spread it on a heated pancake pan. Fry pancakes on both sides for about 2 minutes on each side. Fry about 8 pancakes.