Preheat oven to 350°. Mix DRY ingredients together in 8-by-8 baking pan. Smooth out the dry ingredients. Using a spoon or cup bottom, make three large holes in dry mix. In one hole pour vanilla, next vinegar, then oil and last pour water over entire mix. Stir with a fork until thoroughly mixed. Bake at 350° for 35-40 minutes. Cool and top with powdered sugar or frosting.