2 c. flour
1 c. sugar
4 tbsp. cocoa
1 tsp. baking powder
1 tsp. baking soda
1 c. mayonnaise
1 c. cold water
1 tsp. vanilla

Sift together flour, sugar, cocoa, baking powder, and soda. Add mayonnaise, cold water and vanilla. Beat 2 minutes. Bake in a 350 degree oven for 30 or 35 minutes.