Quick Fudge Frosting
["1 lb. powdered sugar", "1/2 c. dry cocoa", "1/4 tsp. salt", "1 tsp. vanilla", "6 Tbsp. boiling water", "1/3 c. butter"]
["Pour dry ingredients; mix together and add 6 tablespoons boiling water, vanilla and butter.", "Blend, then beat with mixer or spoon until smooth and thickened.", "If frosting stiffens too quickly while spreading, just stir in a few drops of hot water."]
["powdered sugar", "cocoa", "salt", "vanilla", "boiling water", "butter"]