Preheat your pellet smoker to 225F. Make sure you use premium, natural pellets made from fresh hardwoods.
Trim the excess fat from the brisket, leaving a thin layer on top. This will help keep the brisket moist during cooking.
In a small bowl, mix together the kosher salt, black pepper, garlic powder, onion powder, paprika, chili powder, and brown sugar.
Rub the spice mixture all over the brisket, making sure to cover all sides.
Place the brisket on the pellet smoker, fat side up. Close the lid and let it smoke for 4-6 hours.
After 4-6 hours, pour the beef broth over the brisket. This will help keep it moist and add flavor.
Continue cooking the brisket for another 4-6 hours, or until the internal temperature reaches 200-205°F. You can check the temperature with a meat thermometer inserted into the thickest part of the brisket.
Once the brisket reaches the desired temperature, remove it from the pellet smoker and let it rest for at least 30 minutes before slicing.
Slice the brisket against the grain and serve with your favorite sides.
Enjoy your delicious low and slow cooked brisket!