Preheat the oven to 180 °C.

NextBeat the eggs with the sugar and honey and add the melted butter and mandarin zest.

Beat the eggs with the sugar and honey and add the melted butter and mandarin zest.

NextAdd the flour, baking powder and salt and mix until you have a sticky dough.

Add the flour, baking powder and salt and mix until you have a sticky dough.

NextAdd the whole hazelnuts and, with floured hands, shape two long logs on baking paper.

Add the whole hazelnuts and, with floured hands, shape two long logs on baking paper.

NextBake for 25 min and leave to cool for 10 min.

Cut the logs diagonally into thin slices.

NextBake the slices again for 10-15 min, until dry and golden.