Fantasy Fudge
["3 c. brown sugar", "3/4 c. margarine", "2/3 c. (5 1/3 oz. can) evaporated milk", "1 (12 oz.) pkg. semi-sweet chocolate pieces *", "1 (7 oz.) jar Marshmallow Creme", "1 c. chopped nuts", "1 tsp. vanilla"]
["*One", "12", "ounce package butterscotch pieces may be used instead of the chocolate for a light butterscotch flavor."]
["brown sugar", "margarine", "milk", "semi-sweet chocolate", "Marshmallow Creme", "nuts", "vanilla"]