Texas Sheet Cake
["2 sticks margarine", "1 c. water", "4 Tbsp. cocoa", "2 c. flour", "2 c. sugar", "1/2 tsp. salt", "2 eggs", "1/2 pt. sour cream (8 oz.)", "1 tsp. soda", "1 stick margarine", "4 Tbsp. cocoa", "6 Tbsp. milk", "1 lb. powdered sugar", "1 tsp. vanilla", "1 c. chopped nuts"]
["Boil margarine, cocoa and milk for 1 minute.", "Remove from heat and add powdered sugar, vanilla and chopped nuts.", "Pour and spread over cake while hot."]
["margarine", "water", "cocoa", "flour", "sugar", "salt", "eggs", "sour cream", "soda", "margarine", "cocoa", "milk", "powdered sugar", "vanilla", "nuts"]