Roughly chop the peanuts. Mix the butter, peanut butter, cane sugar and egg until creamy. Mix the flour and baking powder and stir in. Fold in 40 g peanuts.
Place a small pile of the dough with a teaspoon on a baking sheet lined with baking paper, leaving enough space so that the biscuits will spread apart. Sprinkle with the remaining peanuts, press down a little and bake at 160 ° C (fan oven) for about 15 minutes. Loosen carefully and let cool on a cake wire.
Roughly chop the chocolate, melt it in a bain-marie, fill a small piping bag and cover the biscuits in strips. When the cookies are for Christmas, you can decorate them with colorful sugar pearls, etc.