Swedish Sugar Cookies
["1 c. powdered sugar", "1 c. sugar", "1 c. butter (not margarine)", "1 c. oil", "2 eggs", "1 tsp. vanilla", "4 c. sifted flour", "1 tsp. cream of tartar", "1/4 tsp. salt"]
["Cream first 4 ingredients; add eggs and vanilla and mix well. Add last 3 ingredients and mix well; chill.", "When ready to bake, roll into walnut size balls and flatten with the bottom of a glass dipped in sugar; a heavy glass with a patterned bottom works well. Bake at 375\u00b0 for 10 to 12 minutes."]
["powdered sugar", "sugar", "butter", "oil", "eggs", "vanilla", "flour", "cream of tartar", "salt"]