Easy Penuche Icing
["1/2 c. margarine", "1/4 c. milk", "1 c. brown sugar, packed", "1 3/4 to 2 c. sifted powdered sugar"]
["Melt margarine in saucepan.", "Add brown sugar; boil over low heat.", "Heat 2 minutes, stirring constantly.", "Stir in milk; bring to boil, stirring constantly.", "Cool to lukewarm.", "Gradually add powdered sugar.", "Beat until thick enough to spread.", "If too stiff, add a little hot water."]
["margarine", "milk", "brown sugar", "powdered sugar"]