Sift into an ungreased 9x13 pan, the flour, baking soda and salt. Combine cocoa and sugar in a small bowl and stir into the flour mixture. Make 3 holes in mixture. In the first hole, palce the vinegar. The vanilla goes in the second hole. The third hole is filled with the melted butter. Pour water over all. Stir with a fork, mix in flour with a spatula. Bake 35-45 minutes until done, test done.
*** Can be halved and placed in a 8 or 9 inch square pan.
