Bring 2 cups of sugar and 250 g of butter (margarine) to the boil with 1/2 glass of milk and 5 tablespoons of cocoa in a saucepan, always stirring well. Then let it cool down.
Stir in the 4 egg yolks, 2 cups of flour and 2 teaspoons of baking powder. Chop the fruits (amount as desired) well with a long knife. The raisins and / or almonds etc. and in any case mix in 1 tube of rum aroma. You can also take 2 teaspoons of rum.
Beat the egg whites until stiff and fold into the batter.
Pour the dough into a buttered Gugelhupf tin (also a cake tin with a pipe insert) sprinkled with breadcrumbs and bake in the oven on the 2nd rack from the bottom with convection and 160 ° C for about 50-60 minutes. (Do a chopstick test!)