Creating Slow-Cooker Mississippi Chicken is straightforward if you follow these steps:

1. Prepare the Chicken: Place the chicken breasts in the bottom of the slow cooker.
2. Add Seasonings: Sprinkle the ranch seasoning mix evenly over the chicken.
3. Add Gravy Mix: Follow with the au jus gravy mix, ensuring the chicken is well-coated.
4. Add Peppers: Pour the pepperoncini peppers and their juice over the chicken.
5. Top with Butter: Cut the butter into pieces and place them on top of the mixture in the slow cooker.
6. Cook: Cover and set your slow cooker on low for 6-8 hours or high for 4-5 hours.
7. Shred the Chicken: Once cooked, shred the chicken using two forks right in the slow cooker and mix it with the juices.
8. Serve: Allow the chicken to soak in the juices for a few minutes before serving.

Following these steps will lead you to a delicious meal that everyone will love!