Preheat pellet grill or smoker to high smoke or 225 degrees F°.
With a paper towel pat the brisket dry. Generously season all sides of the brisket with rub.
Put brisket in the smoker, fat side up and smoke until internal temperature reaches 165 degrees F (about 8-10 hours).
Remove from grill or smoker and wrap brisket in aluminum foil and continue smoking until internal temperature reaches between 190 - 205 degrees F (about 2-3 hours).
Let brisket rest in aluminum foil for 1 hour in a cooler.
Notes
Pro tip: Depending on the size of your brisket, smoking time may vary. Always go by internal temperature to get the best results.