Cooked Fudge Icing
["3 c. sugar", "6 Tbsp. cocoa", "pinch of salt and soda", "2 Tbsp. shortening", "1 c. evaporated milk", "1 1/2 sticks butter"]
["Mix all ingredients except butter.", "Cook until firm ball forms when dropped into cold water.", "Remove from heat.", "Add butter. Beat until spreading consistency.", "Frost 3 layers or 1 pound cake."]
["sugar", "cocoa", "salt", "shortening", "milk", "butter"]