First, season the chuck roast with salt and pepper. Heat olive oil in a frying pan over medium-high heat. Sear each side of the roast until it forms a nice, brown crust. Searing your meat adds flavor and helps lock in juices but is optional; you can skip to step 2 if you're short on time.
Place the chuck roast in the bottom of your crock pot.
Sprinkle the ranch dressing mix and the au jus gravy mix evenly over the roast.
Place the stick of butter on top of the roast. Scatter the pepperoncini peppers around and on top of the roast. If you want a spicier dish, you can also add some of the pepperoncini juice.
Optional Water: If you prefer your pot roast to have more liquid, add 1/2 cup of water around the sides of the roast.
Cover the crock pot with its lid. Cook on high heat for 4-5 hours or low heat for 8 hours, depending on how much time you have.
The roast should be tender and easily shred apart with a fork when it’s done.
Remove the cooked roast from the crock pot and either shred it with two forks or slice it against the grain.
Return the shredded or sliced meat back to the crock pot to soak up the juices for a few minutes before serving. Serve hot, ideally over mashed potatoes, rice, or with a side of vegetables.
The leftover meat makes GREAT sandwiches! I recommend slicing a hoagie bun in half and placing them face open on a baking sheet. Add provolone cheese to each side and layer on the warmed pot roast meat then broil for 4-5 minutes or until the cheese is melted and bubbling!