In a heavy 8 quart sauce pan, melt butter over medium heat. Blend in flour and corn starch using a wire whip. Stir until well blended, evenly cooked and bubbly; about 2-3 minutes. Remove from heat. Stir in water, Karlsburger Beef Base and Gravy Bouquet. Heat to boiling over medium heat, stirring frequently. Boil and stir one minute. Serve hot.

Yield: One gallon or approximately 64 – 2 oz servings.