Chocolate Mayo Cake Be The First To Review By Anonymous recipe Comments | 0 Favorites | 20 Print My mom made this cake while living in the Depression. It is so good, I hope this fills your needs and your memories. Chocolate Mayo Cake Ingredients 3 cups all-purpose flour1 1/2 teaspoons baking soda1 1/2 cups white sugar1 1/2 cups mayonnaise1/3 cup unsweetened cocoa powder1 1/2 cups water2 1/4 teaspoons baking powder1 1/2 teaspoons vanilla extract Instructions 1 Preheat oven to 350 degrees (175 degrees C). Lightly grease two 9 inch layer pans. 2 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. 3 Bake at 350 degrees F (175 degrees C) for 30 minutes. Cool, remove from pans, and frost with your favorite chocolate frosting.