Fajita Chicken Casserole is a vibrant, flavorful dish that brings the bold taste of sizzling fajitas into a simple, baked format. Loaded with juicy chicken, colorful bell peppers, onions, and classic fajita spices, this casserole is perfect for a hearty family dinner. It’s an easy one-dish meal that satisfies with both flavor and convenience.
Why You’ll Love This Recipe
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Classic fajita flavors in a comforting casserole format
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Quick to prepare and perfect for weeknight dinners
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One-dish meal with minimal cleanup
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Packed with lean protein and fresh vegetables
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Great for meal prep and leftovers
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Naturally gluten-free and customizable
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Colorful and visually appealing
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Can be made spicy or mild to suit your taste
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Kid- and family-friendly
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Delicious on its own or served with rice, tortillas, or salad
Ingredients
(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)
4 boneless, skinless chicken breasts, cut into bite-sized pieces
1 packet (1 oz) fajita seasoning mix
1 tablespoon olive oil
1 red bell pepper, thinly sliced
1 green bell pepper, thinly sliced
1 yellow bell pepper, thinly sliced
1 medium onion, thinly sliced
Directions
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Preheat your oven to 375°F (190°C).
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In a large mixing bowl, combine the chicken pieces with olive oil and fajita seasoning. Toss until the chicken is evenly coated.
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In a lightly greased baking dish, spread the seasoned chicken evenly across the bottom.
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Layer the sliced red, green, and yellow bell peppers and onion over the top of the chicken.
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Cover the dish with foil and bake for 25–30 minutes, or until the chicken is cooked through and the vegetables are tender.
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For a more roasted texture, remove the foil during the last 5–10 minutes of baking.
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Serve hot, optionally garnished with fresh cilantro, lime wedges, or shredded cheese.
Servings and Timing
Servings: 4–6
Prep Time: 10 minutes
Cook Time: 30–35 minutes
Total Time: 40–45 minutes
Variations
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Add shredded cheese on top before the final 10 minutes of baking
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Mix in black beans or corn for extra substance
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Substitute chicken with shrimp, turkey, or tofu for different proteins
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Use a homemade fajita seasoning blend for full control over flavors
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Serve over rice, in tortillas, or with cauliflower rice for a low-carb option
Storage/Reheating
Storage: Store leftovers in an airtight container in the refrigerator for up to 3 days.
Reheating: Reheat in the oven at 325°F (160°C) or in the microwave until warmed through. For best texture, reheat covered and stir midway through.
FAQs
Can I use pre-cooked chicken for this recipe?
Yes, but reduce the baking time and only cook until heated through to prevent over-drying.
Is fajita seasoning spicy?
It can be mildly spicy, depending on the brand. Choose a mild or spicy version to suit your preference.
Can I prepare this casserole ahead of time?
Yes, assemble it a few hours in advance, cover, and refrigerate. Bake when ready to serve.
What type of cheese pairs well with this casserole?
Cheddar, Monterey Jack, or a Mexican blend work beautifully if you want a cheesy topping.
Can I freeze the casserole?
Yes, freeze before or after baking. Wrap tightly and thaw overnight in the refrigerator before reheating.
Can I add rice directly to the casserole?
It’s best to cook rice separately, as it may not cook evenly when added raw.
Are there low-carb options for this dish?
Yes, skip beans and serve with cauliflower rice or low-carb tortillas.
Can I use frozen bell peppers?
Yes, but fresh peppers will give a better texture. Thaw and drain frozen ones before use.
How do I know the chicken is fully cooked?
Check that the internal temperature reaches 165°F (74°C) and the meat is no longer pink.
What sides go well with this casserole?
Spanish rice, refried beans, avocado slices, or a fresh salad are great accompaniments.
Conclusion
Fajita Chicken Casserole brings all the savory, sizzling flavors of traditional fajitas into a simple, family-friendly bake. With juicy chicken, sweet peppers, and zesty spices, this dish is a dependable go-to for any busy evening. Easy to customize and even easier to enjoy, it’s a satisfying way to serve a crowd or prepare meals in advance.
Print
Fajita Chicken Casserole
- Total Time: 45 minutes
- Yield: 4–6 servings
- Diet: Low Calorie
Description
This Fajita Chicken Casserole brings all the bold, smoky flavors of chicken fajitas into an easy, baked one-pan dish. Loaded with seasoned chicken, colorful bell peppers, onions, and melty cheese, this low-carb casserole is a weeknight winner your whole family will love!
Ingredients
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4 boneless, skinless chicken breasts, cut into bite-sized pieces
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1 packet (1 oz) fajita seasoning mix
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1 tablespoon olive oil
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1 red bell pepper, thinly sliced
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1 green bell pepper, thinly sliced
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1 yellow bell pepper, thinly sliced
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1 medium onion, thinly sliced
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1 cup shredded cheddar cheese (or Mexican blend)
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1/2 cup shredded Monterey Jack cheese
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Optional toppings: chopped cilantro, sour cream, avocado slices, lime wedges
Instructions
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Preheat Oven:
Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish. -
Season the Chicken:
In a bowl, toss the chicken pieces with olive oil and fajita seasoning until evenly coated. -
Assemble the Casserole:
In the baking dish, spread seasoned chicken evenly. Top with sliced bell peppers and onions. -
Bake:
Cover with foil and bake for 25 minutes. Remove foil, sprinkle cheeses evenly on top, and return to oven uncovered for another 10–15 minutes, or until chicken is fully cooked and cheese is melted and bubbly. -
Serve:
Garnish with cilantro and your favorite fajita toppings. Serve as-is or with tortillas, rice, or a fresh side salad.
Notes
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Swap chicken for ground beef or turkey for variation.
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Add jalapeños for a spicier kick.
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Great as leftovers—use in wraps or quesadillas the next day!
- Prep Time: 10 minutes
- Cook Time: 35 minutes
- Category: Main Course / Casserole
- Method: Baking
- Cuisine: Tex-Mex
