Mix the room temperature butter with powdered sugar, vanilla sugar, cinnamon and cocoa until frothy. Separate the eggs. Beat the egg whites into snow and stir in the yolks in the butter, then fold in the egg whites. Mix in the flour and baking powder and finally stir in the red wine. Bake in a wreath dish at 180 ° C for about 40 minutes.
Let the cake cool for about 15 minutes, turn out of the mold, let cool down completely and dust with powdered sugar.