Powdered Walnut Cookies

Directions

1. 1
   Place walnuts, 1/4 cup confectioners sugar, and salt in a food processor, pulse to break up nuts, then process until nuts are finely ground.
2. 2
   Add butter a few pieces at a time, pulsing to incorporate, then process until mixture is smooth; pulse in vanilla.
3. 3
   Add flour and pulse until incorporated.
4. 4
   Process until dough begins to form a ball.
5. 5
   Place dough on large piece of plastic wrap, form into a very flat disc, cover completely with wrap, and refrigerate until firm enough to roll into balls, at least 2 hours or overnight.
6. 6
   Preheat oven to 350 degrees F. Line 2 rimmed cookie sheets with parchment paper.
7. 7
   Roll dough between your lightly floured palms into 1-inch balls and place 2 inches apart on cookie sheets, Gently flatten just enough so they dont; roll off.
8. 8
   Bake until light golden brown around edges, about 15 minutes.
9. 9
   Place pan on rack to cool for 5 minutes, then sift remaining 1 cup confectioners sugar over warm cookies.
10. 10
    After cookies have cooled completely, roll them in sugar on the sheets to cover completely.