Put sugar, butter in flakes, salt, flour, cinnamon and egg in a bowl. Knead first with the dough hooks of the hand mixer, then with your hands to a smooth shortcrust pastry. Wrap the dough in foil and chill for about 30 minutes.
Roll out the dough one after the other in several portions on a floured work surface to a thickness of about 0.5 cm. Cut out stars and hearts (approx. 6 cm Ø). Knead the rest of the dough with the next portion again and again.
Place on 3 baking trays lined with baking paper. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) one after the other for 10-12 minutes. Remove and let cool on a cake rack.
Chop the chocolate and melt over a warm water bath. Halve the apricots and cut a heart or star (approx. 1.5 cm Ø) out of each half. Put chocolate with the help of a spoon on the biscuits in stripes.
Place 1 apricot star or heart per cookie in the middle. Place the biscuits in a cool place for about 30 minutes until the chocolate is firm.