Makes 2 -9 inch round layers

3 cups all-purpose flour
1 1/2 teaspoons baking soda
1 1/2 cups white sugar
1 1/2 cups mayonnaise
1/3 cup unsweetened cocoa powder
1 1/2 cups water
2 1/4 teaspoons baking powder
1 1/2 teaspoons vanilla extract

Preheat oven to 350 degrees (175 degrees C). Lightly grease two 9 inch layer pans.

Mix flour, baking soda, baking powder, cocoa, and sugar into a large bowl. Stir in mayonnaise. Gradually add water and vanilla and blend until smooth. Pour batter into prepared pans.

Bake at 350 degrees F (175 degrees C) for 30 minutes. Cool, remove from pans, and frost with your favorite chocolate frosting.