Use one 8 x 8 inch pan for baking. This same pan is used to mix the cake batter. There is no greasing of pans or using extra mixing bowls. Sift flour, soda, sugar, salt and cocoa rith into your baking pan. Combine vinegar, vanilla, and cooking oil. Make three little holes with your finger in the sifted dry ingredients and pour in the oil mixture. Over all this pour 1 cup water. Stir and mix well. Bake at 350 degrees for 20 to 25 minutes. Cool and frost with chocolate frosting.