Vinegar Cake
["3 c. flour", "2 c. sugar", "4 to 6 Tbsp. cocoa", "2 tsp. baking soda", "1 tsp. salt", "2 tsp. vanilla", "3/4 c. oil", "2 c. water", "2 Tbsp. vinegar"]
["Sift together the first 5 ingredients.", "Then add the next 4 ingredients.", "Beat together well.", "Bake in a greased, floured sheet pan at 350\u00b0 for 30 minutes, until cake springs back when touched."]
["flour", "sugar", "cocoa", "baking soda", "salt", "vanilla", "oil", "water", "vinegar"]