Mix the butter with the sugar until frothy. Gradually stir in the flour, all the hazelnuts, bitter almond flavor and salt. Carefully fold in the chocolate sprinkles.
Shape the dough into a roll, cut the roll into slices and shape them into crescents. Bake in a preheated oven at 160 degrees (convection 140 degrees) for 15 to 20 minutes.
Melt the couverture and dip one corner of each moons. Place on a wire rack to cool down.