Easy Penuche Icing
["1/2 c. margarine", "1/4 c. milk", "1 c. packed brown sugar", "3 c. confectioners sugar"]
["Melt margarine and stir in brown sugar.", "Cook until bubbly. Remove from heat.", "Add milk and beat until smooth.", "Add confectioners sugar until desired consistency."]
["margarine", "milk", "brown sugar", "confectioners sugar"]