Cheesy Chicken Fajita Casserole – The Easy One-Pan Tex-Mex Dinner Everyone Craves 🌮🧀
This chicken fajita casserole combines everything you love about classic fajitas into one easy baked dish—juicy chicken, colorful peppers, creamy sauce, bold Tex-Mex seasoning, and plenty of melted cheese.
It’s a quick, family-friendly dinner that delivers all the sizzling fajita flavor without standing over the stove making tortillas one by one. Many popular versions combine chicken, peppers, onions, creamy ingredients, and cheese into a comforting one-pan casserole.
🛒 Ingredients
- 2 lbs boneless skinless chicken breasts or thighs, diced
- 1 tablespoon olive oil
- 3 bell peppers, sliced
- 1 onion, sliced
- 1 packet fajita seasoning
- 1 cup sour cream
- 4 oz cream cheese, softened
- 2 cups shredded cheddar or Mexican cheese blend
- Salt and black pepper, to taste
Optional toppings:
- Avocado
- Salsa
- Sour cream
- Fresh cilantro
👩🍳 Instructions
Step 1: Preheat the Oven
Preheat oven to 350°F (175°C).
Step 2: Cook the Chicken
Heat olive oil in a large skillet over medium heat.
Cook chicken until browned and fully cooked. Remove and set aside.
Step 3: Sauté the Vegetables
In the same skillet, cook sliced peppers and onions until slightly tender.
Step 4: Make It Creamy
Return chicken to the skillet.
Stir in fajita seasoning, sour cream, and cream cheese until fully combined and creamy.
Step 5: Add Cheese
Sprinkle shredded cheese evenly over the top.
Step 6: Bake
Bake for 10–15 minutes, until the cheese is melted and bubbly.
Step 7: Serve
Top with avocado, salsa, cilantro, or extra sour cream before serving.
🍽️ Serving Suggestions
This easy fajita casserole is delicious served with:
- Warm tortillas
- Rice or cauliflower rice
- Tortilla chips
- Mexican-style salad
Many recipes also recommend serving it with guacamole, salsa, or extra cheese for even more flavor.
⏱️ Recipe Details
- Prep Time: 10 minutes
- Cook Time: 35 minutes
- Total Time: 45 minutes
- Servings: 6–8
🥗 Nutritional Information (Per Serving)
- Calories: ~395 kcal
- Protein: 29 g
- Carbohydrates: 9 g
- Fat: 28 g
Nutritional values are consistent with popular chicken fajita casserole recipes online.
💡 Tips for the Best Chicken Fajita Casserole
- Use rotisserie chicken for an even faster meal.
- Add jalapeños for extra heat.
- Swap cheddar for pepper jack cheese for more spice.
- Serve in tortillas for a traditional fajita-style dinner.
Many cooks also use cream cheese and sour cream together to create the rich, creamy texture that makes this casserole so satisfying.
⭐ Why This Recipe Is So Popular
- One-pan dinner with easy cleanup
- Loaded with classic fajita flavors
- Creamy, cheesy, and filling
- Perfect for meal prep or busy weeknights
- Low-carb and family-friendly
This cheesy chicken fajita casserole is the perfect combination of comfort food and Tex-Mex flavor—easy enough for weeknights, but delicious enough everyone will ask for seconds.

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