2 c. unsifted 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 bottoms of two 9-inch 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. Beat in mayonnaise at low speed. Add flour mixture in 4 additions alternately with water, beginning and ending with flour. Pour into pans; bake at 350 degrees for 30-35 minutes. Move cake from pans when cool; frost.