Old-Timey Chocolate Icing
["1/2 c. butter or margarine", "1/2 c. cocoa", "1/2 c. milk", "1/2 tsp. salt", "1 tsp. vanilla", "2 c. sugar"]
["Melt butter, then add the other ingredients.", "Stir until sugar dissolves and spread on cake.", "If it's too thick, add a little milk."]
["butter", "cocoa", "milk", "salt", "vanilla", "sugar"]