2 1/2 c. flour
2 c. sugar
1/2 c. cocoa
1 tsp. baking soda
1 c. water
1 c. oil
1 c. buttermilk
2 eggs
1 tsp. vanilla

Mix all ingredients together. Pour into 9x13 inch baking pan. Bake at 350 degrees for 30 to 35 minutes.