We are told that to cook delicious barbecue brisket it should be cooked for 12 to 14 hours over a low and slow fire. Having visited the central Texas barbecue brisket "Meccas" including Kreuz Market, Smitty's Market, Black's BBQ and Snow's BBQ, I can tell you that none of them cook brisket for 14 hours. Now, they may hold it in a warmer for several hours after cooking it and the cook time plus the warmer time could be as much 14 hours. But, truth be told, you only need five hours to cook a delicious, tender, mouth watering barbecue brisket and here is how to do it.
Separate the flat from the point and then remove all of the excess fat that you don't want to eat.
Now, slice the brisket against the grain (that part is very important), put it in a serving dish, pour the de-fatted au jus over it, and serve it with sauce or without sauce. But the brisket will be so good you won't need sauce. In fact, Kreuz Market doesn't offer barbecue sauce at all. They serve brisket with avocado, cheese, sauerkraut, white bread, and a plastic knife and it's delicious.