2 c. unsifted flour
2/3 c. Hershey's cocoa
1 1/4 tsp. baking soda
1/4 tsp. baking powder
1 2/3 c. sugar
4 eggs
1 tsp. vanilla
1 c. Hellmann's real mayonnaise
1 1/3 c. water

Grease and flour bottom of two 9 inch layer cake pans. Mix first 4 ingredients, set aside. In large bowl with mixer at high speed beat next 3 ingredients 3 minutes or until light and fluffy. At low speed beat in real mayonnaise. Add flour mixture in 4 additions, alternately with water beginning and ending with flour. Pour into pans. Bake at 350 degrees for 30 to 35 minutes. Cool in pans 10 minutes. Remove and cool on racks. Frost.