French Buttercream Cookies
["3/4 c. soft margarine", "1 1/2 c. powdered sugar", "1 tsp. soda", "1 tsp. cream of tartar", "1/4 tsp. salt", "1 beaten egg", "1 tsp. vanilla", "2 1/4 c. flour"]
["In large bowl, combine ingredients on low speed of mixer about 1 minute.", "Blend well.", "Chill dough about 15 to 20 minutes before shaping into 3/4-inch balls.", "Place on greased cookie sheets. Flatten with fork and bake at 350\u00b0 for 5 to 8 minutes.", "This is a soft light cookie."]
["margarine", "powdered sugar", "soda", "cream of tartar", "salt", "egg", "vanilla", "flour"]