1Heat oven to 350ºF. In large bowl, break up cookie dough. Stir or knead in flour, pecans and vanilla until well blended.
2Shape dough into 54 (1-inch) balls. Place 1 inch apart on ungreased cookie sheets.
3Bake 10 to 14 minutes or until set but not brown. Remove from cookie sheets. Cool 1 minute on cooling rack.
4Roll warm cookies in powdered sugar; place on cooling rack. Roll in powdered sugar again.