Can I use chicken thighs instead of breasts?
Yes. Chicken thighs will stay moister during baking and add richer flavor. Increase baking time by 5–10 minutes and check internal temperature reaches 165°F.
Can I make this ahead of time?
Assemble the casserole (minus baking) up to 24 hours ahead, cover, and refrigerate. Add 5–10 minutes to bake time when cooking from cold.
What if I don't have pepperoncini peppers?
Substitute with diced banana peppers or pickled jalapeños for similar tangy heat, using 2 tbsp of their pickling liquid in place of pepperoncini juice.
How do I know when the chicken is done?
Insert a meat thermometer into the thickest part of the chicken; it should reach 165°F. Chicken will also be opaque and shred easily when fully cooked.
Can I double this recipe?
Yes. Double all ingredients and use a 9×13-inch baking dish. Baking time may increase by 10–15 minutes; check chicken temperature to confirm doneness.