130g icing sugar
350g wheat flour
2 Tbsp cocoa powder
A recipe from good old socialist Germany before David Hasselhoff tore down the wall.
Take out the butter in advance until it has room temperature.
Mix with icing sugar and flour. Split the dough in two halves. Mix one half with the cocoa powder, until it’s mixed evenly. Wrap both halves in plastic wrap and put in the fridge for about an hour.
Sprinkle your work top with flour and preheat the oven to 180°C or 355°F. Roll out the dough (both halves) and put one on top of the other. Now roll them up. Take a sharp knife and cut out slices. They should have a swirly pattern now. Put the cookie slices on a tray with a baking sheet. Put in the oven for 10-15 minutes, depending on their thickness. Take out when slightly browned.