Preheat oven to 350 degrees.

Combine flour, sugar, baking powder, salt, and 3 tablespoons of cocoa in a bowl. Add milk, melted shortening, and vanilla extract; stir until blended.

Turn batter into an ungreased 8x8x2 inch baking dish. Combine remaining 3 tablespoons of cocoa and the brown sugar. Sprinkle over batter. Pour hot water over all. (Do not stir)

Bake at 350 degrees for 35-40 minutes or until a toothpick inserted in center about halfway to the bottom of pan comes out clean. Serve warm. Spoon out each serving of pudding cake and invert with sauce on top on dessert plate.