Coarsely chop nuts and ginger. Cream butter, sugar and 1 pinch of salt. Stir in egg. Mix flour and baking powder, stir in briefly. Halve the dough. Add half of the ginger and half of the nuts to one half and the rest of the nuts, chocolate drops and cocoa to the second half.
Place 20 heaps (approx. 4 cm Ø each) of each dough with 2 teaspoons at a sufficient distance on 1 baking tray lined with baking paper, press slightly flatter. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for about 12 minutes. Leave to cool on the baking tray