Pour vinegar into 1 hole, vanilla into another and oil into the third. Pour the water over all and stir mixture well with a fork being sure to reach all corners of the pan. (Mixing will take about 1 1/2 minutes and batter will be almost smooth. Small lumps will disappear in baking).

Bake at 350 degrees about 30 minutes or until a wooden toothpick inserted in the center comes out clean. Dust with powdered sugar when cool.

I use Williams Sonoma's Pernigotti or Dark Jersey cocoa powder for a rich chocolate flavor!