Whisk butter, sugar and vanillin sugar until white-creamy. Stir in the eggs one after the other. Mix flour, baking powder and cocoa. Sift the flour mixture over the butter and egg mixture and fold in. Line 1 muffin tray (12 trays) with paper cups. Place 1 tablespoon of the mixture in each form.
Press 2 caramel sweets on top of each other and cover each with 1 tablespoon of the mixture. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 30 minutes. Remove the muffins and let them cool down. Melt cream and chocolate coating over a warm water bath. Spread half of the muffins with chocolate icing, dust the other half with icing sugar
30 minutes waiting time