1
Cut the cold butter into sheets, add the sugar and salt and crumble it between your fingers. Add the flour, cocoa and ground almonds and knead into a crumbly dough. Finally, add the beaten egg and knead briefly to form a smooth, soft dough. Flatten the dough, wrap it in plastic food wrap and refrigerate for at least 6 hours, preferably overnight.
2
Roll out the cold dough 3 mm thick and cut out 8 circles with the rings. Knead the dough briefly, then roll out again and cut into 8 strips about 2,5 cm wide and 22 cm long. If the dough is too soft, put it in the fridge for 15 minutes before lining the moulds. Line the sides of the moulds with the chilled dough and cut off the top of the dough with a sharp knife (so that the dough is flush with the edge of the mould). Place the lined moulds in the fridge for at least 6 hours.