Step 1

Spray a large crock pot with a non-stick cooking spray or use a crock pot liner.

Step 2

Place onion first and then add the chicken breasts.

Step 3

Sprinkle both packets over the chicken.

Step 4

Add pepperoncini, place pads of butter randomly on top, and then pour the juice over the chicken.

Step 5

Cover and cook on high for 4-5 or low for 6-7 hours.