Place 3-4 pounds chuck roast in the bottom of the slow cooker. Sprinkle 1 (1-ounce) packet ranch seasoning and 1 (1-ounce) packet au jus gravy mix on top of the roast. Top with ¼ cup butter and 8-10 pepperoncini peppers.
Cover with a lid and cook on LOW for 8 hours.
Shred with two forks and serve over mashed potatoes or noodles!
Notes
Storage & Reheating
In the Refrigerator: Once the roast has cooled, place it in an airtight container and store it in the fridge. It will last for about 3-4 days.
To Reheat: You can easily warm this up in the microwave just before serving!