Sieve the flour onto the work surface, make a depression in the middle and add the egg. Spread 125 g sugar, vanillin sugar, salt and 125 g fat on the rim and work everything into a smooth dough.
Cover and put in a cool place for about 30 minutes. In the meantime, roast the nuts in a hot, dry pan for approx. 10 minutes while turning. Place the still hot nuts on a tea towel and rub in the towel until the skin comes off.
Roll out the dough on a floured work surface and cut out circles (7.5 cm Ø). Place 9 pieces on a baking tray lined with baking paper and bake in a preheated oven (electric range: 200°C/ gas: level 3) for 15-20 minutes.
Let thalers cool down on a cake rack. Caramelise the remaining sugar in a pan at low heat until golden. Add remaining fat and melt. Deglaze with 60 ml warm water and simmer until a smooth caramel is formed.
Remove the pan from the heat and let it cool down for about 4 minutes. In the meantime spread the nuts on the talers and let the caramel run over the nuts with a tablespoon. Leave to dry for about 30 minutes.
Melt the couverture in a water bath, let it cool down and warm it up a second time. Oil the grill and place it on a baking tray. Dip the nut thalers with the help of two forks with the dough side into the couverture, let them drip off and put them on the grid.
Let the chocolate coating dry for about 2 hours.