01 - Place the trimmed pork shoulder into the bottom of the slow cooker.
02 - Evenly sprinkle the ranch seasoning, au jus gravy mix, and black pepper over the pork.
03 - Lay the sliced butter on top of the pork, scatter the pepperoncini peppers over and around the meat, and pour in the pepperoncini brine if desired.
04 - Cover and cook on low for 8 hours, or on high for 4–5 hours, until the pork is very tender and shreds easily.
05 - Using two forks, shred the pork in the slow cooker and mix it with the juices.
06 - Serve hot over mashed potatoes, rice, or in sandwich rolls as desired.