Put flour and baking powder into a mixing bowl and mix. Add fat, sugar, vanillin sugar, salt and egg and fold in with the dough hooks of the hand mixer. Finally, knead quickly with cool hands to a smooth dough.
Cover and chill for approx. 30 minutes. Roll out the dough on a lightly floured work surface to a thickness of approx. 4 mm and cut out approx. 16 circles using a round cookie cutter (approx. 8.5 cm Ø). Place on two baking trays lined with baking paper and bake one after the other in a preheated oven (electric range: 200 °C/ gas: level 3) for approx. 12 minutes.
Let the cookies cool down. Warm the jelly to 1 level tablespoon in a pot. Spread 1-2 teaspoons of jelly on each half of the cookies and place the remaining cookies on top.
Mix icing sugar and lemon juice. Warm the remaining jelly also while stirring and stir into one half of the icing sugar icing. Spread one surface half of each cookie with white icing sugar, the other half with pink icing sugar.
Leave to dry and serve on a plate decorated with lemon balm as desired. Makes about 8 pieces.