1 c. mayonnaise
1 c. water
1/4 c. cocoa
1/2 c. oil
2 eggs, beaten
2 c. sugar
2 c. flour
1 tsp. baking soda
1/2 c. buttermilk

Bring to a boil mayonnaise, water, cocoa, and oil. Combine sugar, flour, baking soda, buttermilk, and eggs. Add hot mixture; mix well. Bake at 350 degrees for 20 minutes.

ICING:

1/4 c. cocoa
1 c. butter
1/3 c. buttermilk
1 (1 lb.) box powdered sugar
1 tsp. vanilla

Bring to boil cocoa, butter, and buttermilk. Add powdered sugar and vanilla. Mix well. Pour on brownies on cookie sheet.