Butter Cookies
["1 c. butter", "1 1/2 c. powdered sugar", "1 egg", "1 tsp. vanilla", "2 1/2 c. flour", "1 tsp. baking soda", "1 tsp. cream of tartar", "1/4 tsp. salt"]
["Cream butter thoroughly.", "Add powdered sugar, egg and vanilla; mix well.", "Next, add the dry ingredients.", "Shape into rolls.", "Wrap in waxed paper.", "Chill for at least 3 hours.", "Bake at 375\u00b0 for 10 minutes."]
["butter", "powdered sugar", "egg", "vanilla", "flour", "baking soda", "cream of tartar", "salt"]