1/4 c. each confectioners' sugar & granulated sugar
1 1/4 c. butter (2 1/2 sticks), refrigerated & cut into 8-10 pieces.
2 1/2 c. all-purpose flour

Preheat oven to 275 degrees. Place sugars in food processor and process until very fine. Add butter; pulse until sugar disappears. Add flour; pulse until no dry flour particles remain. (Mixture will be moist and crumbly.) Place in plastic bag and press together to form dough; knead lightly until dough holds together. Remove from bag. Shape dough into 1" balls. Place on unbuttered cookie sheets 2" apart. Flatten each with a cookie press, fork, or the bottom of glass lightly moistened with water. Bake 45 minutes to 1 hour or until pale golden. Remove from cookie sheets; cool completely on wire racks. Yield: about 4 dozen cookies.