If you love the vibrant flavors of Mexican cuisine but crave a comforting, all-in-one dish, this Chicken Fajita Casserole Recipe is exactly what you need. It takes the zest and freshness of classic fajitas and transforms them into a cheesy, hearty casserole that’s perfect for family dinners or meal prepping. With tender chicken strips, sautéed colorful bell peppers and onions, and a creamy cheese blend baked until bubbly, this dish is a guaranteed crowd-pleaser that fills your kitchen with mouthwatering aromas.

Ingredients You’ll Need
These ingredients are wonderfully simple yet essential, each adding a unique touch that makes this Chicken Fajita Casserole Recipe truly shine. From the tender chicken strips to the vibrant peppers and perfectly spiced seasonings, every component plays a part in building the perfect balance of flavor, texture, and color.
- 2 tablespoons olive oil: The base for sautéing, it adds a subtle richness and helps cook the chicken to juicy perfection.
- 1 pound boneless skinless chicken breasts (sliced into thin strips): Provides lean protein and tender bites that soak up the spices beautifully.
- 1 red bell pepper (sliced): Adds sweetness and eye-catching color.
- 1 green bell pepper (sliced): Offers a slight bitterness and crunch that balances the dish.
- 1 yellow bell pepper (sliced): Brings a mild sweetness and sunny hue.
- 1 medium onion (sliced): Delivers sweetness and depth once sautéed.
- 2 cloves garlic (minced): Provides an aromatic punch and rounds out the flavors.
- 1 teaspoon chili powder: The star spice, lending smoky warmth and authentic fajita flavor.
- 1 teaspoon ground cumin: Earthy and fragrant, it complements the chili powder perfectly.
- 1/2 teaspoon paprika: Adds color and a touch of mild sweetness.
- 1/2 teaspoon salt: Enhances all the other flavors.
- 1/4 teaspoon black pepper: Gives a gentle heat and complexity.
- 1/4 teaspoon crushed red pepper flakes (optional): For those who like a bit of extra kick.
- 1 cup sour cream: Adds creaminess and a slight tang, binding everything together.
- 1/2 cup cream cheese (softened): Makes the casserole rich and velvety.
- 1 cup shredded cheddar cheese: Sharp and gooey, it creates that irresistible cheesy crust.
- 1 cup shredded Monterey Jack cheese: Melts smoothly and adds a mild, buttery flavor.
- 1/4 cup chopped fresh cilantro (optional): Brightens every bite with a fresh herbal note.
How to Make Chicken Fajita Casserole Recipe
Step 1: Cook the Chicken
Start by warming olive oil in a large skillet over medium heat. Add the thinly sliced chicken breasts and cook them for about 5 to 6 minutes until they’re no longer pink in the center. This step ensures juicy, flavorful chicken while building the foundation for your fajita flavors. Once cooked, remove the chicken and set it aside to keep the process moving smoothly.
Step 2: Sauté the Vegetables
In the same skillet, toss in the sliced red, green, and yellow bell peppers along with the onion. Sauté them for 5 to 7 minutes until tender but still vibrant — this keeps that perfect fajita crunch. Add the minced garlic and cook for an additional minute to release its lovely aroma without burning. This layering of flavors will bring your casserole to life.
Step 3: Spice it Up
Now, sprinkle in chili powder, ground cumin, paprika, salt, black pepper, and the optional crushed red pepper flakes. Stir this spice blend into the sautéed veggies, allowing the fragrant spices to coat everything evenly. Then, return the cooked chicken strips to the skillet and toss the mixture until the chicken is fully wrapped in those gorgeous fajita spices.
Step 4: Mix the Creamy Base
In a large bowl, blend the sour cream and softened cream cheese until smooth and creamy. This luscious mixture will tie together the spicy chicken and tender vegetables, keeping your casserole delightfully moist and rich. Add the chicken and pepper mixture to the bowl and stir gently to combine for even flavor and texture throughout.
Step 5: Bake to Perfection
Transfer the creamy chicken fajita mixture into a greased 9×13-inch baking dish, spreading it out evenly. Generously sprinkle the shredded cheddar and Monterey Jack cheeses over the top. Bake at 375°F for 20 minutes or until the cheese is melted, bubbly, and slightly golden around the edges. The finished casserole should be irresistibly creamy, cheesy, and packed with those bold fajita flavors you crave.
How to Serve Chicken Fajita Casserole Recipe

Garnishes
Elevate your Chicken Fajita Casserole Recipe experience by adding fresh garnishes. A sprinkle of chopped cilantro adds a bright, herbal contrast to the rich cheese, while a dollop of sour cream or a squeeze of fresh lime juice can provide that final zing. These fresh touches make each bite more exciting and layered in flavor.
Side Dishes
This casserole pairs beautifully with simple side dishes that complement its bold taste. Consider serving it alongside fluffy white or cilantro-lime rice to soak up every creamy bite, warm tortillas for scooping, or a crisp green salad to add a refreshing crunch. Black beans or corn also make excellent additions on the side to enhance the meal’s texture and nutrition.
Creative Ways to Present
Want to switch things up? Serve the casserole layered over a bed of rice or wrapped inside a tortilla like a hearty fajita burrito bake. For a party, portion it into small ramekins or individual bowls topped with extra cheese and baked until bubbly for personalized servings. Whatever way you present it, this dish invites imagination and warmth to your table.
Make Ahead and Storage
Storing Leftovers
Once cooled, store any leftover Chicken Fajita Casserole Recipe in an airtight container in the refrigerator. It will keep well for up to 3 days while maintaining its creamy texture and vibrant flavors. Leftovers make for an effortless lunch or dinner that reheats beautifully.
Freezing
You can freeze the casserole before baking by assembling it in a freezer-safe dish and wrapping it tightly. Freeze for up to 2 months for convenient meal prep. When ready, thaw it overnight in the refrigerator, then bake as directed, adding a few extra minutes to ensure it’s heated through completely.
Reheating
Reheat refrigerated or thawed casserole in the oven at 350°F for 15-20 minutes until warmed through and bubbly. Alternatively, microwave individual portions on high for 2-3 minutes, stirring halfway for even heating. Adding a sprinkle of cheese on top before reheating can revive that freshly baked appearance and taste.
FAQs
Can I use chicken thighs instead of chicken breasts?
Absolutely! Boneless skinless chicken thighs will add a little more richness and juiciness to your casserole. Just slice them into thin strips and cook them the same way — they work wonderfully in this Chicken Fajita Casserole Recipe.
Is this recipe gluten-free?
Yes, this Chicken Fajita Casserole Recipe is naturally gluten-free as long as you use gluten-free spices and cheeses. It’s a perfect choice for those avoiding gluten without sacrificing flavor.
Can I make this dish spicier?
Definitely! Simply increase the amount of chili powder or crushed red pepper flakes to suit your heat preference. You can also add diced jalapeños in the sautéing step for an extra kick.
What can I substitute for sour cream and cream cheese?
If you want to lighten the dish, Greek yogurt works wonderfully as a substitute for sour cream. For cream cheese, you can try mascarpone or a vegan cream cheese alternative depending on your dietary needs.
Can I add other vegetables to the casserole?
Yes! Feel free to toss in black beans, corn, or even diced tomatoes to add extra flavor, texture, and nutrition. Just be mindful of their moisture content so the casserole doesn’t become too watery.
Final Thoughts
This Chicken Fajita Casserole Recipe is a heartfelt favorite that combines all the best parts of a fajita into one comforting dish. It’s bursting with flavor, easy to prepare, and perfect for sharing with loved ones. If you want to bring some cheesy, spicy joy to your dinner table, give this recipe a try – I promise it will become a treasured staple in your home kitchen!
Print
Chicken Fajita Casserole Recipe
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 6 servings
- Category: Main Course
- Method: Baking
- Cuisine: Mexican-American
- Diet: Gluten Free
Description
This Chicken Fajita Casserole is a delicious and hearty Mexican-American dish featuring tender chicken strips, colorful bell peppers, and a creamy blend of sour cream and cream cheese, all baked to perfection with melted cheddar and Monterey Jack cheeses on top. It’s perfect for a comforting family meal that’s both gluten-free and packed with bold fajita flavors.
Ingredients
Protein and Vegetables
- 2 tablespoons olive oil
- 1 pound boneless skinless chicken breasts, sliced into thin strips
- 1 red bell pepper, sliced
- 1 green bell pepper, sliced
- 1 yellow bell pepper, sliced
- 1 medium onion, sliced
- 2 cloves garlic, minced
Spices
- 1 teaspoon chili powder
- 1 teaspoon ground cumin
- 1/2 teaspoon paprika
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/4 teaspoon crushed red pepper flakes (optional)
Dairy and Garnish
- 1 cup sour cream
- 1/2 cup cream cheese, softened
- 1 cup shredded cheddar cheese
- 1 cup shredded Monterey Jack cheese
- 1/4 cup chopped fresh cilantro (optional)
Instructions
- Preheat Oven: Preheat your oven to 375°F to prepare for baking the casserole.
- Cook Chicken: In a large skillet over medium heat, warm the olive oil. Add the sliced chicken breasts and cook for 5-6 minutes until the chicken is cooked through and no longer pink. Remove the chicken from the skillet and set it aside.
- Sauté Vegetables: In the same skillet, add the sliced red, green, and yellow bell peppers along with the sliced onion. Sauté for 5-7 minutes until the vegetables are tender. Add the minced garlic and cook for an additional 1 minute to release its aroma.
- Add Spices and Combine: Stir in chili powder, cumin, paprika, salt, black pepper, and crushed red pepper flakes if using. Return the cooked chicken to the skillet and toss everything together to coat the chicken and vegetables evenly with the spices.
- Prepare Creamy Mixture: In a large bowl, mix the sour cream and softened cream cheese until smooth and well combined. Then add the seasoned chicken and pepper mixture, stirring to fully incorporate all ingredients.
- Assemble Casserole: Transfer the mixture into a greased 9×13-inch baking dish and spread it evenly. Sprinkle the shredded cheddar and Monterey Jack cheeses evenly over the top.
- Bake: Bake in the preheated oven for 20 minutes, or until the cheese is melted, bubbly, and slightly golden on top.
- Garnish and Serve: Remove from the oven and garnish with chopped fresh cilantro if desired. Serve the casserole hot, ideally alongside rice, tortillas, or a fresh green salad for a complete meal.
Notes
- You can substitute Greek yogurt for sour cream to reduce fat and lighten the dish.
- Serve with rice, warm tortillas, or a crisp green salad for a balanced meal.
- Add black beans or corn when mixing the chicken and vegetables for extra texture, nutrition, and flavor.
- This recipe is naturally gluten-free, but always verify ingredient labels to ensure no hidden gluten.

