01 -
Remove pork butt from refrigerator 2 to 3 hours before cooking to reach room temperature. Pat dry thoroughly with paper towels.
02 -
Combine brown sugar, salt, garlic powder, onion powder, paprika, chili powder, and cayenne powder in a bowl. Reserve half for later use if desired.
03 -
Generously coat the entire surface of the pork butt with the seasoning rub, massaging it into the meat. For enhanced flavor, wrap and refrigerate overnight, then bring to room temperature before cooking.
04 -
Pour root beer and apple cider vinegar into the bottom of the Instant Pot. Stir gently to combine.
05 -
Place the seasoned pork butt into the pot. Pour half of the barbecue sauce evenly over the meat.
06 -
Secure lid and set pressure valve to sealing. Cook on high pressure manually for 60 minutes.
07 -
Allow pressure to release naturally for 10 minutes, then perform a quick release to release any remaining pressure.
08 -
Remove pork from pot and shred with two forks, discarding excess liquid and visible fat. Toss shredded pork with the remaining barbecue sauce before serving.