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

Grease and flour pan. Mix first 4 ingredients; set aside. In large bowl with mixer at high speed beat next 3 ingredients for 3 minutes or until light and fluffy at low speed. Beat in mayonnaise. Add flour mixture in 4 additional alternately with water beginning and ending with flour. Bake 30-35 minutes at 350 degrees.