Chicken, onions, and peppers baked in a creamy fajita cheese sauce? We just know y’all are going to love it. This creamy fajita chicken casserole is super nourishing and packs a punch of flavor. It is perfect with a dollop of sour cream and avocado on top and paired with a fresh green salad, or if you are extra hungry, you can enjoy the chicken casserole on top of cauliflower rice, steamed veggies, or zucchini noodles. Enjoy!
Fajita chicken casserole
Even though we love fajitas, sometimes there isn’t time to make the traditional version. That is why we love making this creamy chicken fajita casserole recipe on busy nights. Everyone loves it! We use the same ingredients as for traditional chicken fajitas: chicken, peppers, onions, spices, and cheese. The main difference is that we combine all of those ingredients in a baking dish and bake them instead of cooking them separately.
Key Ingredients for the Creamy Fajita Chicken Casserole
- Chicken breasts
- Bell peppers
- Onion
- Cream cheese
- Tomato sauce
- Chicken stock (or water with bouillon)
- Spices and seasoning: Fajita seasoning, salt, and black pepper
- Vegetable oil
- Mozzarella
- Cilantro or parsley
How to make the fajita chicken casserole
- Prep the base – Preheat your oven and grease a baking dish. Mix cream cheese, tomato sauce, chicken stock, half the fajita seasoning, salt, and pepper into a creamy sauce.
- Assemble the casserole – Toss chicken with remaining fajita seasoning in the dish. Spread sauce over, layer with bell peppers and onion, then top with shredded cheese.
- Bake & serve – Bake until chicken is cooked through and cheese is bubbly. Optionally broil to crisp the top, then serve hot with your favorite sides.
Pro Tips for the Chicken Casserole
Here are a few tips to make the baked chicken fajita casserole easier and even more delicious:
- You can bake the chicken fajita casserole without the shredded cheese and add it at the end before broiling if you prefer.
- The chicken can be cooked ahead (browned in a skillet on the stovetop, for instance), and then you can assemble the chicken casserole at the last minute, right before baking.
- If you prefer a meatier casserole, consider adding sliced spicy sausage during the baking process of the Fajita chicken casserole.
- Freeze individual portions of the chicken casserole so you have a comforting dinner for evenings when you don’t feel like cooking from scratch.
- If you use a bag of frozen veggies, it is best to thaw them first; otherwise, the recipe can end up watery.
Can I make my own fajita spice mix?
Yes, of course! Just use these ingredients and proportions:
- 1 teaspoon cumin powder
- 1 1/2 teaspoon chili powder
- 1 teaspoon garlic powder, or minced garlic
- 2 teaspoon paprika
- Salt and fresh cracked pepper to taste
How and how long to keep the creamy chicken fajita casserole leftovers?
You can keep the leftovers for up to 2 days in an airtight container in your refrigerator. Freeze individual portions of the chicken fajita casserole in ziplock bags for up to 1 month.
Can we reheat the chicken fajita casserole?
Sure, the fajita chicken casserole is easy to reheat the day after. Simply cover with foil and put in the oven at 370ºF (190ºC) for 10 – 15 minutes until heated through.
More chicken casserole recipes
- Spinach Chicken Casserole with Cream Cheese and Mozzarella
- French Onion Chicken Casserole
- Jalapeño Popper Chicken Casserole
- Broccoli Chicken Casserole with Cream Cheese and Mozzarella
Creamy Fajita Chicken Casserole
This creamy chicken fajita casserole is nourishing and packs a punch of flavor. We just know y’all are going to love it!
- 2 large chicken breasts, skinless, boneless, cut into cubes
- 2 bell peppers, red, green, yellow, seeded and cut into strips
- 1 medium onion, minced
- 8oz (225g) cream cheese, softened
- 1/3 cup tomato sauce of your choice (marinara sauce, canned crushed tomatoes...)
- 1/4 cup chicken stock (or 1/4 cup water plays a teaspoon of instant chicken bouillon)
- 1 packet of Fajita seasoning (or make you own fajita mix, see the notes)
- 1/2 teaspoon salt and black pepper
- 1 tablespoon vegetable oil
- 1 cup shredded Mozzarella (or your favorite cheese, Pepperjack, Monterrey Jack, Cheddar…)
- Fresh chopped cilantro, or parsley, for garnish
Instructions
- Preheat your oven to 400°F (200°C) and lightly oil a 9x13 baking dish.
- In a bowl beat cream cheese with tomato sauce, chicken stock, half the fajita mix, salt, and pepper.
- Arrange chicken bites into the prepared baking dish with the remaining of the fajita seasoning mix and toss to coat well. Spread the spicy cream cheese mixture on top and mix well to combine. Then cover the chicken bites with the bell peppers and onion, then sprinkle shredded cheese on top.
- Bake the fajita chicken casserole for 15 – 25 minutes (depending on your oven); until chicken is cooked through and reaches an internal temperature of 165°F (74°C). You can broil your fajita chicken casserole for 2 minutes at the end to crisp up the top if you like. Serve the creamy baked fajita chicken casserole immediately over cauliflower rice, steamed vegetables, zucchini noodles, or as is… enjoy!
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Reviews (14)
Leave a reviewLeave a Reply
Donna
2026-03-12 10:08:03
Fabulous. A definite hit at a family party. I cooked 4 breast & used the stock. I also doubled the cream cheese mixture. Added some black olives. Used 2 packages of Fajita seasoning. Served 13 & aluminum pan was empty
Pam
2026-01-15 22:49:48
My husband really liked it, which was surprising because he doesn’t like a lot of recipes with cream cheese. I didn’t really care for it, I think it would be better to sauté the onions and peppers first and maybe less cream cheese. I don’t plan on making it again.
Christina @Eatwell101
2025-09-21 22:28:38
We used a 9x13-inch baking dish ;)
Sheila in MD
2025-09-19 13:25:57
What size baking dish do you use? I read the entire post but did not see size on pan-apologies if I missed it! This looks delicious!
Diane
2025-01-11 12:32:25
Delicious. I ate it as is. I think my next serving will be over rice. Will make again. ❤
