Marinate a beef brisket in 2 oz. Liquid Smoke, a few dashes of worcestershire sauce, salt, pepper, and onion, garlic and celery salts. Marinate overnight.
Place marinated brisket in a covered roasting pan in a 275 oven. Cook 5 hours. Uncover and pour 6 oz. barbecue sauce over and baste every 15 minutes. Cook one hour longer.
This crowd-pleasing meat will make wonderful sandwiches or will make a great main dish for picnics or potlucks.