Vanilla Refrigerator Wafers
["1/2 c. butter", "1/2 c. margarine", "1 egg", "1 tsp. vanilla", "2 c. flour", "1 tsp. baking soda", "1 tsp. cream of tartar", "1/8 tsp. salt", "1 1/4 c. powdered sugar"]
["Cream together the butter, margarine and powdered sugar.", "Beat in egg and vanilla.", "Combine flour, soda, cream of tartar and salt; add to creamed mixture.", "Mix well.", "Divide dough in half. Form each half into 2-inch round roll.", "Wrap in waxed paper or aluminum foil.", "Chill in refrigerator or freezer; slice 3/8-inch thick.", "Bake on ungreased cookie sheet at 350\u00b0 for 8 to 10 minutes.", "Cool on rack.", "Makes about 7 dozen."]
["butter", "margarine", "egg", "vanilla", "flour", "baking soda", "cream of tartar", "salt", "powdered sugar"]