Why You’ll Love This Recipe

Chicken Fajita Casserole brings all the bold, zesty flavors of classic fajitas into one easy, comforting bake. Packed with tender chicken, bell peppers, onions, and melty cheese, this dish is both satisfying and family-friendly. It’s perfect for busy weeknights, potlucks, or make-ahead meals, combining convenience with Tex-Mex flair.

ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

chicken breasts (cooked and shredded or diced)
bell peppers (red, green, and yellow, sliced)
onion (sliced)
cream cheese
sour cream
shredded cheddar cheese
shredded Monterey Jack cheese
fajita seasoning mix
olive oil
salt and pepper
chopped cilantro (for garnish)

directions

Preheat your oven to 375°F (190°C) and grease a 9×13-inch casserole dish.

Heat olive oil in a skillet over medium heat and sauté sliced onions and bell peppers until slightly tender.

In a large mixing bowl, combine cooked chicken, sautéed peppers and onions, cream cheese, sour cream, fajita seasoning, and half of the shredded cheeses. Mix until well combined.

Spread the mixture evenly in the prepared casserole dish.

Top with the remaining shredded cheese.

Bake for 20–25 minutes or until the cheese is bubbly and lightly golden.

Garnish with chopped cilantro before serving.

Servings and timing

This recipe serves 6 people.
Preparation time: 15 minutes
Cooking time: 25 minutes
Total time: 40 minutes

Variations

Add cooked rice or black beans to make it heartier.
Use rotisserie chicken for quicker prep.
Top with crushed tortilla chips for extra crunch.
Swap sour cream for Greek yogurt for a lighter option.
Add sliced jalapeños for extra heat.

storage/reheating

Store leftovers in an airtight container in the refrigerator for up to 4 days.
Reheat individual portions in the microwave for 1–2 minutes.
To reheat the entire dish, cover with foil and bake at 350°F (175°C) for 15–20 minutes.
You can also freeze it for up to 2 months—thaw in the fridge overnight before reheating.

FAQs

Can I make this casserole ahead of time?
Yes, assemble it in advance and refrigerate until ready to bake.

Can I use frozen peppers?
Yes, just be sure to drain any excess moisture before mixing them in.

Is this recipe spicy?
Not overly—it has a mild kick, but you can adjust spice by using more or less fajita seasoning.

What cheese works best?
A mix of cheddar and Monterey Jack gives the best flavor and melt, but feel free to use your favorites.

Can I make it low-carb?
Yes, this casserole is naturally low-carb without rice or tortillas.

Conclusion

Chicken Fajita Casserole is the perfect blend of flavor, ease, and comfort. With minimal prep and a fiesta of ingredients, it’s a delicious twist on a Tex-Mex classic that’s sure to please. Serve it with a side of guacamole or a crisp salad for a complete meal that’s bursting with flavor and ready to satisfy.