Sift 200 g of flour into a bowl. Mix with baking soda, baking powder and starch. Mix butter, sugar and 1 pinch of salt with the whisk of the mixer. Stir in the egg yolks bit by bit.
Stir in vanilla pulp, brandy and lemon peel. Add the flour mixture and knead into a dough with the dough hooks of the mixer. Shape into a ball, wrap in foil and chill for about 1 hour.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer) and line two trays with baking paper. Roll out the dough in portions on a lightly floured work surface 4-5 mm thin and cut out approx. 70 circles (each approx. 5 cm Ø) with a biscuit cutter.
Place circles on the trays and bake in a hot oven for about 15 minutes until light brown. Remove and let cool on cake racks.
Spread about 1 teaspoon of caramel cream on each half of the biscuits, place the remaining biscuits on top.