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 to 3/4 c. sour cream", "1 tsp. baking soda", "1 tsp. vanilla"]
["Bring to a boil margarine, water and cocoa.", "Put flour, sugar and salt in a big bowl.", "Add hot cocoa mixture to flour and beat well.", "Add eggs, sour cream, baking soda and vanilla.", "Beat until nice and smooth.", "Bake in a greased jelly roll pan at 400\u00b0 for 20 minutes."]
["margarine", "water", "cocoa", "flour", "sugar", "salt", "eggs", "sour cream", "baking soda", "vanilla"]