Cut into party ribs: Slice the St. Louis-style rack into individual party ribs by cutting straight through between each bone, following the natural seam of the meat.
Season: Season all sides of each rib with 'Que That BBQ Seasoning (or your favorite BBQ rub). *I like to go lighter with the seasoning on the two sides and bone side. Then season the top meat side with about 2 tablespoons coarse black pepper (total for all ribs). Let the seasoning sit for about 15 minutes while the grill heats up.
Preheat the grill: Heat the pellet grill or smoker to 250°F with your choice of pellets or wood.
Smoke the ribs: Place the party ribs directly on the grates, meat side up. Smoke until they reach an internal temperature of about 170°F. *This took about 90 minutes for us, but times will vary.
Make the pan sauce: When the ribs are almost done smoking, combine ½ cup hot pepper jelly, ½ cup BBQ sauce, 4 tablespoons butter, 2 tablespoons jalapeño juice, and ⅓ cup pickled jalapeños in a foil pan. Stir briefly to combine.
Braise in the sauce: Once the ribs hit 170°F, place them meat side down into the pan of sauce. Increase the smoker to 275°F and return the uncovered pan to the grill so the sauce can reduce. Continue cooking until the ribs reach an internal temp of about 195-200℉.
Flip and glaze: Once the temp is 195-200℉, flip the ribs meat side up so they sit in the sauce. Brush another ½ cup BBQ sauce over top. Continue cooking until the ribs reach an internal temperature of about 205°F or until probe tender, and the sauce has tacked up a bit.
Rest and serve: Pull the ribs and let them rest briefly. Spoon any remaining pan sauce over the top before serving.