Prep: Trim excess fat and silverskin, then season generously with salt, pepper, and garlic powder.
Smoke: Preheat smoker to 300°F–325°F. Place brisket on the smoker, fat side down.
Wrap: Once the internal temperature reaches $approx$165°F–170°F (usually 2–3 hours), wrap it tightly in aluminum foil (or butcher paper with tallow) to speed up cooking.
Finish: Continue cooking (fat side up) until the internal temperature reaches 203°F–210°F or it feels "like butter" when probed.
Rest: Let the brisket rest in a dry cooler for at least 1–2 hours before slicing against the grain.