Heat a grill to medium. Grill the steaks to the desired doneness.
Bring 4 cups water to a boil in a medium pot over medium heat. Add the au jus mix and the brandy. Let boil for 10 minutes. While that cooks, in a separate small saucepan, combine the margarine and the flour to make the roux. Let the roux cook for 5 minutes. Add the roux to the au jus mixture and stir with a wire whisk until smooth. Stir in the cream and the black pepper. Arrange the steaks on serving plates and serve drizzled with the sauce.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of David Egan, head chef of Cattlemen's Steakhouse, Oklahoma City, OK