Methods :
Preheat oven 350 degrees F Greased & flour a 9×13 inch cake pan. Sift flour, cocoa, baking soda, baking powder and salt.
Blending shortening, sugar and creamed eggs in a large bowl. Stir the sourdough into the sourdough.
Slowly add flour mixture to creamed mixture, beating until smooth. Stirring in water also vanilla; blend well. Pour batter to prepared pan.
Baking in preheated oven until toothpick inserted in center comes out clean, for 35 mn.
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