Cooling/Resting Time: None
Place chicken breasts in slow cooker.
Sprinkle half of brown gravy mix and half of ranch seasoning on chicken, flip breasts and coat other side with remaining seasonings.
Pour chicken broth around edges of slow cooker.
Add pepperoncini peppers throughout slow cooker.
Top with butter slices, spreading evenly.
Cover and cook on LOW for 4-5 hours until chicken reaches 165F and is tender.
Shred chicken with two forks in the slow cooker.
Stir shredded chicken into liquid to coat with sauce.
Serve over mashed potatoes, rice, or egg noodles.