01 - 
                Coat your crockpot with a nonstick spray to keep food from sticking.
              
              
              
                02 - 
                Start with the diced onion spread across the bottom. Lay the chicken breasts directly on top of the onions.
              
              
              
                03 - 
                Sprinkle the au jus and ranch mixes evenly over the chicken. Add the pepperoncinis all around, then pour their juice into the pot.
              
              
              
                04 - 
                Place the butter slices over the chicken to finish the layering.
              
              
              
                05 - 
                Put the lid on and let it cook. Use the low setting for about 6 to 8 hours or set it to high for 4 to 5 hours, until the chicken is tender.
              
              
              
                06 - 
                When done, shred the chicken with two forks and stir everything together until well mixed.