01 -
Pat the beef chuck roast with paper towels until thoroughly dry on all sides to promote even browning.
02 -
Lightly season both sides of the beef with salt and freshly ground black pepper. Heat the vegetable oil in a large skillet over high heat. Once oil shimmers, sear the roast for 2–3 minutes per side, until each surface develops a golden crust.
03 -
Transfer browned beef chuck roast to the insert of a slow cooker, positioning it in the centre.
04 -
Sprinkle ranch dressing mix and onion soup mix evenly over the roast. Place butter pieces on top. Add whole peperoncini peppers on and around the roast.
05 -
Cover with the lid. Set the slow cooker to low and cook for 8 hours, undisturbed. Do not lift the lid during the cooking period.
06 -
After 8 hours, remove lid. Using two forks, shred the beef directly in the cooker, discarding large fatty pieces. If desired, chop the peperoncini and mix into the meat. Serve hot over mashed potatoes, rice or bread.