Crock Pot Mississippi Chicken

Bahan-bahan (4 porsi)

• 2 pounds boneless skinless chicken breasts (3-4 large breasts)
• 1 packet ranch seasoning mix (1 ounce)
• 1 packet au jus gravy mix (1 ounce or brown gravy mix, low sodium)
• 12 pepperoncini peppers (plus ½ cup juice)
• 1 stick butter (sliced (½ cup) )