Melt-In-Your-Mouth Sugar Cookies
["1 c. powdered sugar", "1 c. granulated sugar", "1 c. margarine", "1 c. oil", "1 tsp. salt", "2 eggs", "4 2/3 c. flour", "1 tsp. soda", "1 tsp. cream of tartar", "1 tsp. vanilla"]
["Mix together.", "Roll in balls and dip in sugar.", "Flatten slightly with bottom of glass dipped in sugar.", "Bake at 350\u00b0 until set."]
["powdered sugar", "sugar", "margarine", "oil", "salt", "eggs", "flour", "soda", "cream of tartar", "vanilla"]