Mix flour, icing sugar and salt. Add egg, butter and peanut butter in flakes. Knead first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Cover and chill for about 30 minutes. Roll out the dough on a floured work surface. Cut out approx. 50 circles with a ring cutter with a wavy edge (5 cm Ø) and place them on a baking tray lined with baking paper. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 8-10 minutes.
Remove the cookies and let them cool down on a cake rack. Put about 1/2 teaspoon of nut nougat cream on each half of the biscuits in the middle. Place the remaining circles on top. Chop the chocolate and melt over a warm water bath. Pour chocolate into a piping bag or freezer bag and cut off a small corner. Decorate cookies with chocolate and halved peanut kernels. Let them set in a cool place
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