This is a recipe my mother made when we were children. It was so moist it never needed frosting. Mom would use a paper doily to make a pretty powdered sugar design on the top. I have found a couple online, but they just were not as good.
Thoroughly mix dry ingredients in an ungreased 8 x 11" pan. Make 3 wells in the dry mixture and pour the vegetable oil in one, the vanilla in a different one and the vinegar in the last one. Pour the cold water over all and stir with fork until well blended.
Bake for 30 minutes. Cake is done when center springs back when lightly touched. Do not test with a toothpick or knife.