Heat oven to 350 degrees F. Grease an 8-inch square baking pan.
Mix first 5 dry ingredients in the prepared baking pan. Make 3
depressions in dry ingredients – two small, one larger. Pour vinegar in one
small depression, vanilla extract in the other small depression and the
vegetable oil in third larger depression. Pour water over all. Mix well
Bake on middle rack of oven for 35 minutes. Check with a wooden pick to
make sure it comes out clean. Cool.