Mix butter, teabag contents, 50 g icing sugar, vanillin sugar, lemon zest and flour. Add egg yolks and knead quickly. Form a roll and let it rest in the fridge for about 3 hours. Cut the roll of dough into 40 slices, then shape them into balls.
Flatten 20 balls with a fork, flatten 20 with a small spoon. Place cookies on 1-2 baking trays lined with baking paper. Bake the trays one after the other in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 10-15 minutes and let them cool down. Dust the cookies with 1 tablespoon icing sugar
3 1/2 hours waiting time. E g/F 2 g/KH 4 g