1 1/2 c. flour
1 tsp. baking soda
1/2 tsp. salt
1 c. sugar
3 tbsp. cocoa

Sift flour, baking soda, salt, sugar, and cocoa in an ungreased 8 x 8 inch pan. Make 3 holes in dry mixture. In one hole, put 1 tablespoon vanilla, in second hole put 1 tablespoon vinegar, and in third put 1/2 cup oil. Pour 1 cup water over all and stir with a fork until bumps are gone. Bake at 350 degrees for 30 minutes. Serve with Cool Whip on top.