Mississippi Mud Chicken Bake

This Mississippi Mud Chicken Bake is the kind of dinner that makes everybody suddenly appear in the kitchen asking, “When is it ready?” We’ve got juicy chicken baked over ranch-seasoned red onions with barbecue sauce, tangy pepperoncini, loads of melty mozzarella, and a rustic buttery French fried onion topping. Everything goes into the oven together under a tightly sealed layer of foil, which traps in all those delicious juices and keeps the chicken ridiculously tender. Then you remove the foil and let that onion topping get golden and crunchy while everything underneath turns piping hot, bubbly, cheesy, and absolutely loaded with flavor.

Now, I need you to understand something very important: you cannot make this recipe without mashed potatoes. I don’t make the rules—actually, yes I do, and mashed potatoes are mandatory here. This chicken is so rich and saucy that you need a big fluffy pile underneath it to catch all that cheesy barbecue ranch goodness. Depending on what kind of night you’re having, serve it with my Grandma’s Mashed Potatoes, No Peel Perfect Mashed Potatoes, or Easy Weeknight Mashed Red Potatoes. Pick your potato personality, pile this chicken right on top, and thank me later.

Melissa Jo’s Tips!

• Freshly shred the mozzarella so it melts smoothly and evenly.

• Butterfly the chicken into thin, evenly sized pieces so everything cooks at the same rate.

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• Use about ¼ cup of barbecue sauce per whole chicken breast.

• Tightly seal the foil around the baking dish during the first 25 minutes. This traps in the juices and keeps the chicken tender and juicy.

• Crush the French fried onions only slightly. You want rustic, crunchy pieces, not fine crumbs.

• Watch the topping during the final few minutes because French fried onions can brown quickly.

• Make sure the chicken reaches an internal temperature of 165°F.

• Let the chicken rest for about 5 minutes before serving.

🤔 Common Questions

Melissa Jo

Mississippi Mud Chicken

5 from 1 vote

Juicy butterflied chicken breasts baked over ranch-seasoned red onions with barbecue sauce, pepperoncini, mozzarella, and a buttery French fried onion topping. It is creamy, tangy, cheesy, crunchy, and ridiculously easy to make!

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Prep Time 15 minutes mins

Cook Time 40 minutes mins

Total Time 55 minutes mins

Servings: 6 people

Course: Main Course

Cuisine: American

Calories: 379

Ingredients

  

1x2x3x?

• 2–3 large boneless skinless chicken breasts
• ½ large red onion sliced into half-moon rounds
• 1 tablespoon olive oil
• 1 packet Hidden Valley Ranch Seasoning
• ½–¾ cup barbecue sauce approximately ¼ cup per chicken breast
• 3–4 sliced pepperoncini per piece of chicken
• 1 teaspoon pepperoncini juice
• 2 cups freshly shredded mozzarella cheese
• 1½ cups French fried onions
• 4 tablespoons salted butter melted

Method

 

Step 1: Prepare the Oven and Chicken

1. Preheat your oven to 350°F.
2. Butterfly 2–3 large boneless, skinless chicken breasts all the way through to create 4–6 thinner pieces of chicken.

Step 2: Season the Onions

1. Add ½ of a large red onion, sliced into half-moon rounds, to the bottom of a 9×13-inch baking dish.
2. Drizzle the onions with 1 tablespoon of olive oil and sprinkle about ¼ of the Hidden Valley Ranch seasoning packet over the top. Toss the onions directly in the baking dish, then spread them into an even layer.

Step 3: Add and Season the Chicken

1. Arrange the butterflied chicken pieces in a single layer over the seasoned onions.
2. Sprinkle the remaining ranch seasoning packet evenly over all the chicken.

Step 4: Add the Barbecue Sauce and Pepperoncini

1. Spoon about ¼ cup of barbecue sauce over each whole chicken breast, dividing it evenly between the butterflied pieces.
2. Add 3–4 sliced pepperoncini to each piece of chicken, then drizzle about 1 teaspoon of pepperoncini juice over the entire baking dish.

Step 5: Add the Mozzarella

1. Sprinkle 2 cups of freshly shredded mozzarella evenly over the chicken.

Step 6: Make the Buttery Onion Topping

1. Add 1½ cups of French fried onions to a large zip-Lock bag. Gently crush them with your hands, keeping the pieces rustic and chunky rather than crushing them into fine crumbs.
2. Pour in 4 tablespoons of melted salted butter. Seal the bag and shake everything together until the onions are evenly coated.
3. Sprinkle the buttery French fried onions evenly over the mozzarella.

Step 7: Cover and Bake

1. Cover the baking dish very tightly with aluminum foil, crimping it securely around all four sides of the dish.
2. This step is important! The tightly sealed foil traps all the steam and juices inside, helping the chicken stay tender and juicy while it cooks.
3. Bake covered at 350°F for 25 minutes.

Step 8: Uncover and Finish Baking

1. Carefully remove the aluminum foil and return the baking dish to the oven uncovered.
2. Bake for another 10–15 minutes, or until the chicken is cooked through, everything is piping hot and bubbling, and the French fried onion topping is golden brown.
3. The thickest part of the chicken should reach an internal temperature of 165°F.
4. Let the chicken rest for about 5 minutes before serving.

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Nutrition

Calories: 379kcalCarbohydrates: 8gProtein: 25gFat: 27gSaturated Fat: 13gPolyunsaturated Fat: 1gMonounsaturated Fat: 7gTrans Fat: 0.3gCholesterol: 98mgSodium: 513mgPotassium: 338mgFiber: 0.4gSugar: 1gVitamin A: 528IUVitamin C: 6mgCalcium: 198mgIron: 1mg

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👝 How to Store Leftovers

Store leftovers in an airtight container in the refrigerator for up to 3–4 days.

Reheat individual portions in the microwave until piping hot. To help the onion topping crisp back up, reheat the chicken in a 350°F oven or air fryer for a few minutes.