Season the entire chuck roast with freshly cracked black pepper to taste.
Heat 1 tablespoon of butter in a large Dutch oven over medium-high heat. Add the roast and sear it lightly on all sides for about 3 minutes. Remove from the heat.
Add ½ cup of water to the Dutch oven, then sprinkle in the ranch seasoning and au jus packet seasoning.
Add the remaining five tablespoons of butter around the roast.
Place the pepperoncini peppers and sliced garlic around the roast.
Cover with a tight-fitting lid and bake for 4 hours, flipping the roast halfway through cooking, until the meat is tender and falling apart.
Remove from the oven. Let it cool for a bit.
Remove any bits of fat, then shred the meat with two forks. Serve. Enjoy!