Drink: cool juice spritzer
Sift the flour over the butter and knead it in. Shape the dough into rolls of about 5 cm diameter and wrap in aluminium foil. Leave the rolls in the refrigerator overnight.
Preheat oven to 190°. Spread the dough sticks all around with the whisked egg yolk and roll in sugar. Carefully cut off 0.5 cm thick slices and place them on a baking tray.
Bake for 10-15 minutes on the middle slide bar. Remove the cookies from the baking tray with a wide knife and let them cool down.