Heat oven to 350°

Beat butter,1/2 cup of sugar and vanilla in a large bowl with mixer until light and fluffy

Gradually add flour, beating on low speed after each cup until blended. Add nuts mix well

Shape dough into 1 inch balls. Place 1 1/2 inches apart on baking sheet. Bake 14 to 15 min or until bottom is lightly browned. Cool 5 min on baking sheet

Roll warm cookies 1 at a time in remaining powdered sugar in small bowl until evenly coated. Place on wire racks until completely cooled