Mexican Wedding Cake
["1 c. butter (1/2 lb.), beaten well", "8 level Tbsp. powdered sugar", "2 c. flour, sifted twice", "1 c. chopped pecans", "1 tsp. vanilla"]
["Roll", "in balls and pat down with a fork.", "Bake lightly. Measure flour before sifting."]
["butter", "powdered sugar", "flour", "pecans", "vanilla"]