Chocolate Sheet Cake
["2 c. flour", "2 c. sugar", "1 stick margarine", "1/2 c. shortening", "4 Tbsp. cocoa", "2 eggs", "2 c. cold water", "1/2 c. buttermilk", "1 tsp. vanilla", "1/4 tsp. salt", "1 tsp. soda"]
["Mix together the flour and sugar in a large mixing bowl.", "Melt butter, shortening, cocoa and water together in saucepan.", "Bring to a boil, then pour sugar and flour.", "Mix well.", "Stir in buttermilk, vanilla, salt, soda and eggs.", "Mix well and pour into well greased cake pan. Bake 20 minutes at 400\u00b0.", "Mix frosting 5 minutes before cake is done."]
["flour", "sugar", "margarine", "shortening", "cocoa", "eggs", "cold water", "buttermilk", "vanilla", "salt", "soda"]