Cream fat and 125 g sugar with the whisk of the hand mixer. Mix flour, ground almonds and lemon peel and knead into the fat mixture. Form equal-sized rolls of approx. 3 cm Ø from the dough on a floured work surface.
Wrap rolls in foil and put them in the refrigerator for about 3 hours (preferably overnight). Whisk the egg yolk and some water. Spread the dough sticks with it. Mix the remaining sugar and vanillin sugar and roll the dough sticks in it.
Cut the rolls into slices about 1/2 cm thick and place them on a baking tray lined with baking paper. Bake in a preheated oven (electric: 175 °C/ gas: level 2) for 10-12 minutes. Let the cookies cool down on a cake rack.
Results in about 120 cookies.