Texas Sheet Bar
["3 sticks margarine", "1 c. water", "8 heaping Tbsp. cocoa", "2 1/2 c. flour", "2 c. sugar", "1/2 tsp. salt", "2 eggs", "1/2 pt. sour cream", "1 tsp. baking soda", "6 Tbsp. milk", "1 lb. powdered sugar", "1 tsp. vanilla"]
["Cake:", "Fits 17 x 11 x 1-inch pan.", "Boil together 2 sticks margarine, water and 4 heaping tablespoonfuls cocoa.", "Remove from heat.", "Add, beating after each addition, flour, sugar, salt, eggs, sour cream and baking soda.", "Bake at 375\u00b0 for 20 to 25 minutes."]
["margarine", "water", "cocoa", "flour", "sugar", "salt", "eggs", "sour cream", "baking soda", "milk", "powdered sugar", "vanilla"]