Chocolate Mayonnaise Cake
["1 3/4 c. flour", "1/3 c. cocoa", "1 1/2 tsp. baking soda", "1 c. mayonnaise", "2 tsp. vanilla", "1 c. sugar", "1 1/2 tsp. baking powder", "1/8 tsp. salt", "1 c. water"]
["Stir flour, sugar, cocoa, baking powder, baking soda and salt; mix thoroughly. Add mayonnaise, water and vanilla and beat well for 3 minutes. Grease and flour a 13 x 9 x 2-inch pan. Pour mixture into pan. Bake in a 350\u00b0 oven for 40 to 45 minutes. When cake cools, frost or use whipped cream."]
["flour", "cocoa", "baking soda", "mayonnaise", "vanilla", "sugar", "baking powder", "salt", "water"]