Texas Sheet Cake
["2 sticks margarine", "4 Tbsp. cocoa", "1 c. water", "1/2 tsp. salt", "2 c. sugar", "2 c. flour", "2 eggs, beaten", "1 tsp. soda", "1/2 pt. sour cream (1 c. or 8 oz.)"]
["Heat and stir until boiling, margarine, water and cocoa. Remove from heat; add salt, sugar, flour, eggs and soda.", "Add sour cream.", "Pour in sheet cake pan, greased.", "Bake at 375\u00b0 for 20 minutes."]
["margarine", "cocoa", "water", "salt", "sugar", "flour", "eggs", "soda", "sour cream"]