Preheat your smoker to 250 degrees F and add your preferred wood chips, such as mesquite, to the smoker tube.
Combine the seasonings in a small bowl and mix until well blended.
Coat the ribs with olive oil or mustard to help the dry rub penetrate the meat. For this recipe, olive oil is recommended for its neutral flavor.
Generously apply the dry rub to all sides of the ribs to ensure a balanced flavor profile.
Allow the ribs to marinate for at least 30 minutes, if possible, to allow the flavors to penetrate the meat and bring it to room temperature for even cooking.
Place the ribs on the smoker rack and cook for 2 hours.
After 2 hours, remove the ribs from the smoker and wrap them in aluminum foil. Return the foil-wrapped ribs to the smoker and cook for an additional 2 hours and 30 minutes, or until the internal temperature reaches 200 degrees Fahrenheit in the thickest part of the rack.
Unwrap the ribs and brush them with your favorite BBQ sauce. Return the ribs to the smoker and cook for an additional 30 minutes.
Remove the ribs from the smoker and let them rest for 15 to 30 minutes before serving.
Cut the ribs into sections and serve with your favorite sides. Enjoy your delicious smoked St. Louis-style ribs!