Beat Spread with sugar until light and fluffy in large bowl with electric mixer, about 3 minutes. Beat in vanilla. Gradually beat in flour until blended. Stir in walnuts. Turn dough onto plastic wrap and shape into flat circle. Cover and refrigerate 1 hour.
Preheat oven to 350°.
Divide dough into 8 pie-shaped wedges. Roll each wedge on lightly floured surface into 1/2-inch log, 12 inches long; cut each log into 4 equal pieces. Shape into crescents and arrange on ungreased baking sheets.
Bake 15 minutes or until edges are lightly golden. Let stand 2 minutes on wire rack; remove from sheets and sprinkle generously with additional confectioners sugar while still warm; cool completely.
