Chocolate Mayonnaise Cake
["3 c. flour", "1 1/2 c. sugar", "2/3 c. cocoa", "2 1/4 tsp. baking powder", "1 1/2 tsp. soda", "1 1/2 c. mayonnaise", "1 1/2 c. water", "1 1/2 tsp. vanilla"]
["Mix together flour, sugar, cocoa, baking powder and baking soda.", "Stir in mayonnaise, add water and vanilla.", "Mix well.", "Put into 2 round pans or a 13 x 9-inch pan that has been greased and floured.", "Bake in 350\u00b0 oven for 30 minutes or until tester comes out clean.", "Frost with your favorite icing."]
["flour", "sugar", "cocoa", "baking powder", "soda", "mayonnaise", "water", "vanilla"]