Preparation / Directions:
To sour the milk, put 2 tsp. white vinegar in a one cup measure, fill with milk to the 2/3 mark, and let stand 15 minutes. Sift the sugar together with the cocoa into a large mixing bowl. Add shortening and cream. Add the eggs and mix well. Sift the flour with the soda and salt. Starting with the dry, alternate with the sour milk in adding to the batter, mixing thoroughly after each addition. Stir in the water, and then beat for a couple minutes. Batter will be thin. Bake in a greased and floured 9x13" pan in a preheated 350 degree oven until the top is firm when pressed with finger - about 35 minutes, more or less.
Cool the cake completely before frosting with Quick Fudge Frosting.