2 cups flour
1 cup sugar
1 ½ teaspoon baking doda
1 ½ teaspoon baking powder
1 teaspoon salt
4 tablespoons cocoa, unsweetened
1 cup mayonnaise
1 cup water
1 teaspoon vanilla
Mix dry ingredients together. Add mayonnaise, water, and vanilla. Stir just long enough to mix. Pour into cake pans and bake at 350 degrees for 35 minutes.
Note: This is delicious. As kids we were amazed that grandma put mayonnaise in a cake.