Lightly toast the flaked almonds in a pan without fat, set aside. Mix the butter with sugar, vanilla sugar and 1 tablespoon water. Work with the mixer for at least 3 minutes. Gradually stir in the flour.
Finally work in the chopped nuts and almonds. Shape the dough into rolls with a diameter of 1.5 cm on a floured work surface and leave to rest in the refrigerator overnight.
On the baking day, preheat the oven to 175 ° C and line a tray with baking paper. Cut the dough rolls into 3 mm thick slices and place them on the baking tray 4 cm apart, press flat and sprinkle with flaked almonds.
Bake the cookies for about 4 minutes. Then immediately cut out the hot cookies with a round cutter, remove them from the tray and let them cool down. Melting on the tongue.