Preheat your pellet smoker to 225°F (107°C) according to manufacturer's instructions.
Prepare the ribs by removing the membrane from the bone side for better smoke penetration.
Brush a thin layer of yellow mustard onto both sides of the ribs. This helps the rub adhere.
Generously apply your chosen pork rub, making sure to coat all sides evenly.
Place the ribs on the smoker grates, bone side down.
Close the lid and let the pellet smoker work its magic, infusing that smoky goodness.
After about 3 hours, spritz the ribs with apple juice or apple cider to keep them moist.
Continue smoking for another 2-3 hours, or until the ribs are tender and the internal temperature reaches around 200°F (93°C).
If desired, brush the ribs with BBQ sauce during the last 30 minutes for a sticky finish.
Remove the ribs from the smoker and let them rest for about 10 minutes.
Slice between the bones and serve up these delectable pellet smoker ribs with your favorite sides.