For the aranzini heather sand, cut the marzipan paste into small cubes or, if it is hard, chop it in a blitz chopper. Also chop the aranzini or cut it into very small pieces.
Cut butter into cubes, knead all ingredients into a shortcrust pastry. Form two rolls from the shortcrust pastry. Whisk the egg whites and roll both rolls in the egg whites first.
Mix the brown granulated sugar with the cardamom and then roll the rolls in it. Now place the rolls in the refrigerator for two hours.
Then cut the cold rolls into slices about 3-5 mm thick, place on baking paper on a baking sheet and bake at 180 degrees until light brown.