This easy recipe requires merely that you drop all ingredients into the slow cooker, then walk away—it’s that simple! Butter, pepperoncini, ranch dressing mix and au jus mix provide all the seasoning to your beef chuck roast. Put the timer on 8 hours and come back to tender beef slow-cooked in its own savory gravy! Make a quick side and dinner is served. Get the recipe for Mississippi Roast - Slow Cooker Pepperoncini Pot Roast.