Combine flour, sugar, cocoa, soda and salt. Make three holes in dry ingredients. Put vinegar in first hole, vanilla in second and oil in third hole. Pour water over all and mix until blended. Beat for about 2 minutes.

Pour batter in greased and floured 8 inch square cake tin. Bake 30-35 minutes.

Very rich and moist cake. Especially good with white icing.