Preheat oven to 350 °F (180 °F).

Coat the butter in the flour on a pastry board.

Knead with confectioner’s sugar and ground nuts to a smooth dough.

Chill for about half an hour.

Form a log from the dough.

Cut off small pieces and shape them into crescents.

Set them on a baking sheet lined with parchment paper and bake for about 10 minutes.

Carefully (they break easily!

) roll the still-hot crescents in a mixture of confectioner’s sugar and vanilla sugar.