Flat cut brisket can be cooked in a variety of ways, including smoking, braising, or roasting. To smoke a brisket, season it with a dry rub or marinade and cook it over low, indirect heat for several hours. To braise a brisket, sear it in a Dutch oven and then add liquid (such as beef broth or red wine) and vegetables before cooking it in the oven for several hours. To roast a brisket, season it and cook it in the oven at a low temperature (around 300°F) until it reaches an internal temperature of 185-190°F. Whichever method you choose, be sure to slice the brisket against the grain to ensure that it is tender and easy to eat.