For the baking mixture, roughly chop the hazelnut kernels. In a pretty glass jar with a screw cap, layer first flour, then ground almonds, then sugar and salt. Add the hazelnuts, flaked almonds and chocolate drops. Close the jar (1 litre capacity) and decorate with a decorative ribbon and a butterfly if necessary.
For the cookies, melt butter in a small pot at low heat, take it down and let it cool down a bit. Whisk egg and milk in a bowl with a whisk. Stir the butter into the whisked egg. Add the contents of the glass and knead well with the dough hooks of the hand mixer. Cover with foil and chill for about 30 minutes.
Shape into 14 talers (approx. 5 cm Ø) with your hands and place them not too tightly on a baking tray lined with baking paper. Bake in a preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) for 14-16 minutes. Remove, let cool well and store in a cookie tin.