Chocolate Sheet Cake
["2 c. flour", "2 c. sugar", "3 Tbsp. cocoa", "1 tsp. cinnamon", "1 stick margarine", "1/2 c. shortening", "1 c. water", "1/2 c. buttermilk", "1 tsp. soda", "1 tsp. vanilla", "2 eggs, slightly beaten"]
["Sift first 4 ingredients in large bowl; set aside. Place margarine, shortening and water in saucepan; bring to a boil. Pour this over dry ingredients and mix. Add soda to buttermilk; add vanilla and eggs, then mix. Grease and flour 9 x 13-inch baking pan. Bake at 400\u00b0 for 20 minutes or until cake is done."]
["flour", "sugar", "cocoa", "cinnamon", "margarine", "shortening", "water", "buttermilk", "soda", "vanilla", "eggs"]