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 the vanilla pulp, brandy and lemon zest. Add the flour mixture and knead into a dough with the dough hooks of the mixer. Form into a ball, wrap in foil and chill for approx. 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 baking trays and bake in a hot oven for about 15 minutes until light brown. Take out and let cool down on cake grills
On half of the biscuits about 1 teaspoon each
waiting time approx. 2 1/2 hours