Caramel Icing
["2 c. sugar", "1 stick margarine", "2 Tbsp. Karo syrup", "1/2 c. sour milk", "1/2 tsp. soda", "vanilla"]
["Cook in heavy skillet until soft ball forms in cold water."]
["sugar", "margarine", "syrup", "sour milk", "soda", "vanilla"]