Lay the racks of ribs on a clean surface. Use a butter knife or your fingers to gently loosen and lift the thin membrane from the back of the ribs. Grip it with a paper towel and peel it off completely.

In a small bowl, combine brown sugar, paprika, salt, black pepper, garlic powder, onion powder, and cayenne pepper. Mix well to create a flavorful dry rub.

Sprinkle the dry rub evenly over both sides of the ribs, pressing it gently to adhere. Let the ribs sit at room temperature for about 15 minutes to allow the flavors to meld.

Preheat your Masterbuilt smoker to 225°F (107°C) using your choice of wood chips (apple, hickory, cherry, or mesquite) for that signature smoky flavor.

Place the seasoned ribs on the smoker grates, bone-side down. Close the smoker and let the ribs smoke for about 3 hours. Maintain a steady temperature of 225°F (107°C).

Lay out two sheets of aluminum foil for each rack of ribs. Place each rack on its own set of foil. Sprinkle about ½ cup of apple juice over each rack. Seal the ribs tightly in the foil to create a packet.

Return the foil-wrapped ribs to the smoker and let them cook for another 2 hours. This step helps tenderize the meat and infuse it with moisture.

Carefully remove the ribs from the foil and place them directly on the smoker grates again. Brush a generous layer of your favorite BBQ sauce on both sides of the ribs.

Let the ribs cook, uncovered, for about 1 more hour. This allows the BBQ sauce to caramelize and develop that irresistible smoky glaze.

Check the internal temperature of the ribs by using a meat thermometer. They're ready when the temperature reaches around 195°F (90°C), and the meat is tender and ready to pull apart.

Carefully remove the ribs from the smoker and let them rest for a few minutes before slicing. Cut between the bones to separate the individual ribs.