Place 3 to 4 pound chuck roast into crockpot and spread dry ranch mix and au jus gravy mix on top. With one stick of butter, cut it in half and place the two halves on top of the roast. Take about 6 to 8 pepperoncini peppers and spread on top and sides of roast. Turn crockpot on high and cook for 4 hours.

When 3 and a half hours have gone by, start cutting potatoes into bite size pieces. If using mushrooms and onions, slice the mushrooms into ⅛ to ¼ inch slices and your onions into half inch slices. Place potatoes, carrots, mushrooms, and onions in the pot. Season with salt and pepper. Place second stick(or half stick) of butter on top and cook on high for 4 more hours

Once the roast has cooked for 8 hours total take all the vegetables out and into a separate bowl and shred the roast. After the roast is shredded as desired put all the vegetables back in and serve in bowls.