1 2/3 c. sugar
3 eggs
1 tsp. vanilla
2 c. flour
2/3 c. cocoa
1 1/4 tsp. baking soda
1/4 tsp. baking powder
1 c. mayonnaise
1 1/2 c. water

Beat sugar, eggs and vanilla until creamy. Sift dry ingredients together and add to egg mixture alternately with mayonnaise and water. Bake at 350 degrees for 30 minutes.