For the chocolate nut hearts, mix the flour with the baking powder.
Crumble the butter and flour, add the remaining ingredients of the dough and quickly knead everything into a smooth dough.
Wrap in plastic wrap and refrigerate for about 1/2 hour. Preheat the oven to 180 °C. Roll out the dough and cut out hearts.
Bake the hearts for about 10 minutes. After cooling, coat the chocolate nut hearts with soft chocolate icing and sprinkle with hazelnut brittle.