Ingredients: 

– For the dough: 

110 g of cake flour 

80 g of hazelnut flour (or peeled, toasted and finely chopped hazelnuts) 

50 g of potato starch

80 g of powdered sugar 

100 g of butter

1 egg yolk 

– For filling and decoration: 

100 g of dark chocolate 

Hazelnut spread

Chopped hazelnuts

Directions: 

1. Mix flour, potato starch, hazelnut flour and powdered sugar in a bowl.

2. Stir in the butter mixing with your hands.

3. Add egg yolk and knead until you get an even dough, then wrap it and refrigerate for 2 hours. 

4. Flatten using a rolling pin and shape the biscuits. Make a hole in the middle of half of them. 

5. Bake in a pre-heated oven at 160° for about 15 minutes. 

6. Fill with hazelnut spread. 

7. Melt dark chocolate (in the microwave or in a water bath) and use to decorate. 

8. Finish with chopped hazelnuts.