Katherine's Amazing Chocolate Cake

1.  Grease and flour a 9" X 12" (24 X 30cm) cake pan.

2.  Preheat the oven to 350F degrees (180C)

3.  Sift:
     2-1/2 cups plain flour
     2 cups sugar
     6 tablespoons unsweetened cocoa powder
     2 teaspoons baking soda
     1 teaspoon salt

4.  Pour over dry ingredients and mix well until smooth:
     1/2 cup cooking oil
     2 teaspoons vanilla
     2 tablespoons vinegar
     2 cups cold water

5.  Pour in pan and bake at 350F (180C) for 35 minutes.
     The cake is ready when it bounces back to the touch
     or a toothpick comes out clean.