Melt dark chocolate over a warm water bath. Melt butter in a small pot. Let both cool down a little. Beat the egg, sugar and butter until creamy with the whisk of the hand mixer. Stir in flour, baking powder, cocoa and chocolate. Cover the dough and chill for about 15 minutes. Cut caramel sweets into 4 pieces.
Cut off approx. 1 1/2 teaspoon of the dough, form into a ball and put 1 piece of candy in the middle of each. Place the ball on 2 baking trays lined with baking paper, leaving a distance of 2-3 cm and press a little flatter. Bake one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 15 minutes. Take out cookies and let them cool down. Melt white chocolate over a warm water bath. Dip cookies up to about halfway into the chocolate. Allow the chocolate to set
1 1/2 hours waiting time