Walnut crescent cookies

Directions

1. In the food processor pulse the butter, sugar and egg white, add flour and walnut (mixed together).
2. Mix only until combined, wrap and place in refrigerator for half an hour.
3. Roll small pieces of dough by hand at the desktop, gently curve ends in the form of a crescent.
4. Place cookies on the baking sheet lined with parchment paper and bake at 325 F for 12-15 minutes.
5. Leave cookies for 10-15 minutes to cool, then roll them in a mixture of superfine sugar or icing sugar and vanilla sugar.