Ho-Ho Cake
["1 box chocolate fudge cake mix", "3 sq. semi-sweet chocolate, melted", "2 sticks margarine", "1/2 c. shortening", "1 c. sugar", "5 Tbsp. flour", "1 1/2 c. milk", "1 tsp. vanilla", "2 1/2 Tbsp. hot water", "1 1/2 c. powdered sugar"]
["Make the cake mix according to package and bake in a 12 x 18-inch greased pan.", "Bake at 350\u00b0 for 15 minutes; cool."]
["chocolate fudge cake mix", "semi-sweet chocolate", "margarine", "shortening", "sugar", "flour", "milk", "vanilla", "water", "powdered sugar"]