Knead a shortcrust pastry with the remaining ingredients. Halve the dough and incorporate the melted chocolate into one part. Wrap both doughs separately in foil and place in a cool place.
Knead the dough until smooth and form a roll of the same length. Interweave these rolls so that a marbled roll about 3 cm thick is created. Cut slices of about 5 mm with a sharp saw knife. Place these on baking paper and bake at 160 ° C for about 10-15 minutes until golden.