Cooked Chocolate Fudge Icing
["2 sticks butter", "1 c. sugar", "4 Tbsp. cocoa", "1/2 c. evaporated milk", "1 tsp. vanilla", "1 box 4x confectioners sugar"]
["Combine butter, sugar, cocoa and milk in a medium saucepan. Bring to a boil and cook one minute more.", "Add vanilla and confectioners sugar.", "Beat with a mixer until thick or stands at a peak."]
["butter", "sugar", "cocoa", "milk", "vanilla", "confectioners sugar"]