This was a quick, yummy dinner everyone in the family gonna love! Tender chicken, crisp veggies, and rice are coated in creamy fajita sauce in this easy, tasty meal.
Juicy chicken, colorful peppers and onions with a little kick of seasoning. Smooshed between melty cheese, it’s the sort of thing that comes together in a flash with just about no effort.
However, I like to spice it up with cilantro, avocado, or sour cream. Just put on whatever you love and enjoy the ride!
Why You Gonna Love This Recipe?

- One-pan meal – easy cleanup and minimal effort
- Bold and flavorful – all the classic fajita flavors in casserole form
- Cheesy and satisfying – loaded with melty goodness
- Great for meal prep – leftovers taste even better
Ingredient Required for Cooking Chicken Fajita Casserole:
- Boneless Skinless Chicken Breasts – The STAR of the recipe! Finely chop so each bite gets a piece. Chicken thighs work too, if you don’t have breasts — they stay extra juicy!
- Olive Oil — Just enough to sauté the veggies. It tenderizes them and coax out the sweetness. No olive oil? Butter works too!
- Bell Peppers – For color and crunch and that CLASSIC fajita flavor. It can be any color — red, green, yellow. No peppers? Skip those and try zucchini or mushrooms instead.
- Shallots, Onion & Garlic – These two together make everything better! Onion adds a touch of sweetness, and garlic? It just adds this extra punch of flavor, oh.
- Fajita Seasoning – The magic blend that adds that smoky, zesty, touch spicy kick. No fajita seasoning? Taco seasoning works too! Now, let’s switch things things up a bit…
- Diced Tomatoes with Green Chiles – For a touch of zing and a hint of heat. If you prefer more heat, add some diced jalapeño!
- Cream Cheese – Melts into a rich creamy sauce that clings to everything… ohhh, just wait till you taste it! If you’ve ever wondered what makes the sauce so rich, THIS IS IT.
- Shredded Cheddar or Monterey Jack Cheese – Gooey, melty, and golden brown on top… I mean, honestly, who doesn’t love that? You could use any good melting cheese — even mozzarella, if it’s what you have.
- Fresh Cilantro, Chopped – Something fresh & bright at the end! Don’t like cilantro, no problem — green onions also work.
- Salt & Pepper – Basic, but SO essential! Salt gradually, and taste as you go.
How to Cook Chicken Fajita Casserole?
Preheat the oven. Preheat it to 375°F. Oil or butter a 9×13-inch baking dish to prevent sticking.
Step 1: Cook the chicken
Slicing into bite-size pieces for easy consumption The packet of taco seasoning, potato, and half the fajita seasoning. In a large skillet, heat 1 tablespoon olive oil over medium-high heat. Drop in the chicken, cooking for about 6 to 8 minutes while stirring now and again until browned and fully cooked through. Transfer to the baking dish.
Step 2: Sauté the veggies.
Add the rest of the olive oil in the same pan. Add the bell peppers, onion and garlic. Sauté for about 5-7 minutes, stirring occasionally, until the veggies begin to soften and become fragrant
Step 3: Mix everything together.
Add the cooked veggies on top of the chicken in the dish. Add the undrained diced tomatoes and green chiles — the juices help keep it all moist and flavorful. Gently stir to incorporate all the ingredients.
Step 4: Add the cheese.
Dollop small pieces of softened cream cheese over the top. Then sprinkle the shredded cheese all over as your gooey top layer. Want extra cheese? Go for it! 🧀
Step 5: Bake!
Put the dish — uncovered — into the oven for 20 to 25 minutes. It’s done when it’s bubbling, and the cheese is melted and golden. Then take it out of the oven Tabasco sauce and fresh cilantro for color and more flavor. Allow to rest a few minutes before serving. Enjoy!
Tips for Making Your Meal More Delicious:
- Don’t overcook the chicken! Since it will bake eventually, just cook it until it’s not pink anymore. Overcooking can make it dry.
- Keep the veggie crunch! Sauté the peppers and onions until a bit softened but not mushy — they’ll cook the rest of the way in the oven.
- Use full-fat cream cheese. It melts better and produces a richer, creamier texture in the sauce. They can get watery in low-fat versions.
- Let it rest before serving. Letting it sit for 5 minutes helps meld the flavors and makes it easier to serve.
- Customize the heat! Want it spicier? To the peppers, add jalapeños from a jar or some extra fajita seasoning. Prefer mild? Use mild diced tomatoes and green chiles.
Chicken Fajita Casserole Recipe
This Chicken Fajita Casserole is a quick, cheesy, and flavorful meal the whole family will love. Juicy chicken, colorful peppers, and a creamy fajita-seasoned sauce come together in one easy dish. Topped with melty cheese, it bakes to perfection in just 25 minutes. Perfect for busy nights with minimal effort!

Ingredients
Instructions
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Preheat oven to 375°F (190°C) and grease a 9×13-inch baking dish.
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Cook chicken: Season with half the fajita seasoning. Heat 1 tbsp oil in a pan, cook chicken for 6-8 mins until browned. Transfer to the baking dish.
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Sauté veggies: Add 1 tbsp oil, cook bell peppers, onion, and garlic for 5-7 mins until soft. Stir in the remaining fajita seasoning.
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Combine: Pour veggies over chicken. Add undrained diced tomatoes with green chiles and mix.
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Add cheese: Dot with cream cheese, then sprinkle shredded cheese evenly on top.
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Bake uncovered for 20-25 mins until bubbly and cheese is melted.
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Garnish with fresh cilantro and let it sit for a few minutes before serving.
Servings 7
- Amount Per Serving
- Calories 350kcal
- % Daily Value *
- Total Fat 20g31%
- Saturated Fat 9g45%
- Cholesterol 90mg30%
- Sodium 720mg30%
- Potassium 480mg14%
- Total Carbohydrate 14g5%
- Dietary Fiber 3g12%
- Sugars 5g
- Protein 30g60%
- Vitamin A 900 IU
- Vitamin C 45 mg
- Calcium 250 mg
- Iron 2.5 mg
- Vitamin D 10 IU
- Vitamin E 2 IU
- Vitamin K 20 mcg
- Thiamin 0.2 mg
- Riboflavin 0.3 mg
- Niacin 10 mg
- Vitamin B6 0.7 mg
- Folate 50 mcg
- Vitamin B12 0.5 mcg
- Biotin 5 mcg
- Pantothenic Acid 1 mg
- Phosphorus 300 mg
- Chromium 10 mcg
- Molybdenum 15 mcg
- Chloride 200 mg
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.