2 c. flour
4 tbsp. cocoa
1/2 salt
2 tsp. baking soda
1 c. sugar
1 c. mayonnaise
1 c. water
1 tsp. vanilla

Mix all ingredients in order given.

Bake in a 9 x 13 pan 25 minutes at 350°F. It's good with a powdered sugar frosting with butter in it.