01 -
Remove pork butt from refrigerator 2-3 hours before cooking, unwrap and pat dry with paper towels.
02 -
Combine brown sugar, salt, garlic powder, onion powder, smoked paprika, chili powder, and cayenne pepper in a bowl to create the rub.
03 -
Generously coat pork butt all over with seasoning rub, massaging it into the meat thoroughly.
04 -
Pour root beer and apple cider vinegar into the bottom of the pressure cooker and stir to combine.
05 -
Place seasoned pork butt into the Instant Pot and pour half of the barbecue sauce evenly over the top.
06 -
Secure lid and set pressure release valve to 'SEAL'. Program manual high pressure for 60 minutes.
07 -
Allow natural pressure release for 10 minutes, then perform a quick release for any remaining pressure.
08 -
Remove meat, shred using two forks, discard cooking liquid, remove any excess fat, then stir in remaining barbecue sauce.