Mix the potash and 3 tablespoons of hot water. Put 250 g flour, almonds, cocoa, sugar, butter, lard, syrup, spices and condensed milk in a bowl. Add the dissolved potash and knead to a smooth dough using the dough hooks of the mixer.
Wrap in foil and chill for about 2 hours.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2). Line two baking trays with baking paper. Roll out the dough on some flour to a thickness of approx. 8 mm and cut out approx. 45 round cookies (approx. 3 cm Ø).
Spread cookies on the trays. Bake in the oven for about 10 minutes. Let them cool down.
Roughly chop the chocolate, put it in a freezer bag or piping bag and melt it in a hot water bath. Cut off a small corner and decorate the pepper nuts with chocolate strips. Leave to dry.