Ingredients:
1 4-lb beef chuck roast
1/4 cup butter
5 pepperoncini peppers
1 (1 ounce) packet ranch dressing mix
1 (1 ounce) packet dry au jus mix

Directions:
1. Place roast in a slow cooker.
2. Form a pocket in the top of roast and place butter, pepperoncini peppers, ranch dressing mix, and au jus mix in the pocket. 
3.Cook on low for 8 hours.