Lemon Bars
["1 c. butter or margarine", "2 c. flour", "1/2 c. powdered sugar", "2 c. sugar", "4 Tbsp. flour", "1 tsp. baking powder", "4 eggs", "rind and juice from 1 lemon"]
["Blend first three ingredients and pat into a 9 x 13-inch baking pan.", "Bake at 350\u00b0 for 15 minutes or until lightly browned.", "Sift together the next three ingredients."]
["butter", "flour", "powdered sugar", "sugar", "flour", "baking powder", "eggs", "rind"]