**Prepare the Brisket:** Trim any excess hard fat from the brisket, leaving about a 1/4-inch layer on the top (the fat cap). Trim the sides and bottom to remove any hard, thick pieces of fat. You want a smooth surface for the rub to adhere to. If the brisket has a very thick deckle (fat between the flat and point), you can trim some of that away, but leave some for moisture and flavor.

**Make the Rub:** In a small bowl, combine the kosher salt, black pepper, garlic powder, onion powder, paprika, and cayenne pepper (if using). Mix well.

**Apply the Rub:** Generously coat the entire brisket with the spice rub, pressing it gently into the meat on all sides. Don't be shy with the rub – it forms the flavorful crust, or 'bark'. Let the brisket sit at room temperature for about 30-60 minutes while you prepare your smoker.

**Prepare the Smoker:** Preheat your smoker to 225-250°F (107-121°C). Use your preferred wood, such as oak, hickory, or mesquite, for smoking. Ensure you have enough fuel (wood chunks, chips, or pellets) to maintain a consistent temperature for several hours.

**Smoke the Brisket:** Place the brisket directly on the smoker grate, fat cap up. Insert a meat thermometer into the thickest part of the flat, avoiding any large pockets of fat. Close the smoker lid.

**The Long Haul:** Smoke the brisket for approximately 1 to 1.5 hours per pound. This is a general guideline, and the internal temperature is the most crucial factor. After about 4-6 hours, or when the brisket has developed a nice, dark bark, you can begin spritzing it every hour with water or beef broth if you notice it drying out. Continue smoking until the internal temperature reaches 195-205°F (90-96°C) in the thickest part of the flat.

**The Stall and Wrap:** Brisket often hits a 'stall' where the internal temperature plateaus. This is normal. If the bark is set and the brisket is taking too long, you can wrap it tightly in butcher paper or foil to push through the stall and retain moisture. Continue smoking until the target internal temperature is reached. The meat should feel probe tender – a thermometer probe should slide into the thickest part with very little resistance.

**Resting is Crucial:** Once the brisket reaches the desired temperature and tenderness, remove it from the smoker. Wrap it tightly in foil or butcher paper if it isn't already, and place it in a cooler or a warm oven (turned off) to rest for at least 2-4 hours, or even longer. Resting allows the juices to redistribute throughout the meat, resulting in a much more tender and moist brisket.

**Slice and Serve:** Unwrap the brisket and let it sit for about 15-20 minutes before slicing. Slice against the grain, typically about 1/4-inch thick. The point and flat will have grains running in different directions, so identify them before slicing.