Chocolate Sheet Cake
["2 c. flour", "2 c. sugar", "4 Tbsp. cocoa", "1 stick margarine", "1 c. water", "1/2 c. cooking oil", "1/2 c. buttermilk", "1 tsp. soda", "2 eggs", "1 tsp. vanilla"]
["Sift flour with sugar and cocoa.", "Combine margarine, water and oil in saucepan; bring to a boil and pour over flour mixture. Combine buttermilk in which soda has been dissolved with eggs and vanilla.", "Add to mixture; beat well.", "Pour into 11 x 16-inch baking pan.", "Bake at 400\u00b0 for 20 minutes."]
["flour", "sugar", "cocoa", "margarine", "water", "cooking oil", "buttermilk", "soda", "eggs", "vanilla"]