1 1/2 c. general purpose flour
1 1/2 c. self-rising flour
2 c. sugar
1 egg
1 c. oil
2 tbsp. vinegar
2 c. water
1 tbsp. vanilla extract
2 tsp. baking soda
6 tbsp. cocoa

Stir well. Bake in a 9x13 inch pan at 350 degrees for 30-45 minutes.