Chicken Fajita Skillet Casserole: Easy One-Pan Tex-Mex Dinner

If you love chicken fajitas but want a quick, easy, and cheesy meal with minimal cleanup, this Chicken Fajita Skillet Casserole is the perfect recipe! Made with seasoned chicken, sautéed bell peppers, onions, and plenty of melted cheese, this one-pan dish brings all the bold Tex-Mex flavors you love:without the need for tortillas.

This low-carb, high-protein, and meal-prep-friendly casserole is a great option for busy weeknights. Serve it on its own, over rice, or with a side of tortilla chips for the ultimate comforting dish!

Why You’ll Love This Recipe

This Chicken Fajita Skillet Casserole is packed with flavor, incredibly easy to make, and perfect for any night of the week. Whether you’re looking for a quick dinner, a meal-prep option, or a low-carb alternative to classic fajitas, this dish has you covered! Here’s why it’s a must-try:

✔ One-Pan Meal – Minimal dishes and easy cleanup!

Nobody likes washing a pile of dishes after cooking! Since this recipe is made entirely in one skillet, you get all the bold flavors of fajitas without the extra mess. Just cook the chicken, sauté the veggies, add the cheese, and bake:all in the same pan.

💡 Bonus: Using a cast-iron or oven-safe skillet means fewer dishes and effortless serving straight from the pan!

✔ Quick & Easy – Ready in 30 minutes with simple ingredients.

Busy weeknights call for fast and delicious meals, and this casserole comes together in just 30 minutes. Made with simple, everyday ingredients like chicken, bell peppers, onions, and cheese, it requires minimal prep time while still delivering bold, restaurant-quality flavors.

💡 Time-Saving Tip: Slice the bell peppers and onions ahead of time for an even faster cooking process!

✔ Customizable – Adjust the spice level or add your favorite toppings.

Love extra spice? Add jalapeños, cayenne, or hot sauce. Want it even cheesier? Toss in extra shredded cheese. Looking for added texture? Top it with crushed tortilla chips, avocado slices, or a dollop of sour cream.

💡 Make It Your Own: You can easily swap chicken for beef, turkey, or shrimp, or add extra veggies like mushrooms or zucchini!

✔ Low-Carb & Keto-Friendly – Skip the tortillas for a delicious, guilt-free meal.

Craving fajitas but cutting back on carbs? This casserole skips the tortillas while still giving you all the classic fajita flavors. The cheesy, creamy goodness combined with sautéed peppers and onions makes this a hearty, satisfying meal without the extra carbs.

💡 Keto Tip: Swap sour cream for full-fat Greek yogurt and serve with cauliflower rice for an even lower-carb meal!

✔ Perfect for Meal Prep – Stores well and reheats beautifully!

This Chicken Fajita Skillet Casserole is just as delicious the next day, making it perfect for meal prep. Store it in the fridge and reheat for a quick, protein-packed lunch or dinner throughout the week.

💡 Storage Tip: Keep leftovers in an airtight container for up to 3 days. Reheat in the oven at 350°F (175°C) for 10 minutes or microwave for 1–2 minutes.

Ingredients

• 1 lb boneless, skinless chicken breasts or thighs, sliced into strips
• 1 tbsp olive oil
• 1 red bell pepper, sliced
• 1 yellow bell pepper, sliced
• 1 green bell pepper, sliced
• 1 small onion, sliced
• 1 tsp chili powder
• 1 tsp cumin
• ½ tsp smoked paprika
• ½ tsp garlic powder
• ½ tsp salt & black pepper
• ½ cup sour cream or Greek yogurt
• 1 cup shredded cheddar or Mexican blend cheese
• Juice of 1 lime
• Fresh cilantro, chopped (for garnish)

💡 Pro Tip: Add sliced jalapeños or a dash of cayenne pepper for extra heat!

Instructions

1. Sauté the Chicken & Vegetables

• Heat olive oil in a large oven-safe skillet over medium-high heat.
• Add chicken strips, season with chili powder, cumin, smoked paprika, garlic powder, salt, and black pepper, and cook until golden brown and fully cooked (about 5–7 minutes).
• Remove chicken and set aside.

2. Cook the Fajita Vegetables

• In the same skillet, add sliced bell peppers and onions.
• Sauté for 3–5 minutes until softened but still slightly crisp.

3. Combine & Add Creamy Base

• Return the cooked chicken to the skillet.
• Stir in sour cream or Greek yogurt and mix until evenly coated.

4. Add Cheese & Bake

• Sprinkle shredded cheese evenly over the top.
• Transfer the skillet to the oven and bake at 375°F (190°C) for 10 minutes, or until the cheese is melted and bubbly.

5. Garnish & Serve

• Remove from the oven, squeeze fresh lime juice over the top, and garnish with chopped cilantro.
• Serve as-is, over rice, or with tortilla chips for scooping!

💡 Serving Tip: Add toppings like avocado slices, salsa, or a drizzle of hot sauce for extra flavor!

Recipe Variations

🔹 Spicy Chicken Fajita Casserole – Add diced jalapeños, extra chili powder, or hot sauce for more heat.
🔹 Low-Carb & Keto-Friendly – Swap sour cream for full-fat Greek yogurt and serve with cauliflower rice.
🔹 Cheesy Ranch Fajita Casserole – Mix ranch seasoning into the sour cream for a tangy twist!
🔹 Extra Veggie Version – Add mushrooms, zucchini, or spinach for a nutrition boost.

Frequently Asked Questions (FAQs)

❓ Can I make this casserole ahead of time?

Yes! This Chicken Fajita Skillet Casserole is perfect for meal prep. You can assemble the casserole up to 24 hours in advance and store it in the fridge, covered. When you’re ready to eat, simply bake it as directed for a fresh, hot meal without any extra prep!

💡 Pro Tip: If making ahead, wait to add the cheese until just before baking to keep it melty and fresh.

❓ How do I store leftovers?

Store any leftover casserole in an airtight container in the refrigerator for up to 3 days. To reheat:

• Oven: Bake at 350°F (175°C) for 10 minutes until warmed through.
• Microwave: Heat in 30-second intervals, stirring in between, until hot.

💡 Storage Tip: If the casserole seems dry after reheating, add a splash of broth or extra cheese to restore moisture!

❓ Can I use rotisserie chicken instead of fresh chicken?

Absolutely! Using shredded rotisserie chicken is a great time-saver and makes this recipe even easier. Simply:

• Skip the chicken cooking step and stir in pre-cooked shredded chicken when adding the sautéed peppers and onions.
• Reduce baking time slightly since the chicken is already fully cooked.

💡 Pro Tip: Rotisserie chicken adds extra flavor:especially if it’s already seasoned!

❓ What’s the best cheese for this recipe?

You can customize the cheese to your taste, but here are some great options:

• Mexican blend – A mix of cheddar, Monterey Jack, and Queso Quesadilla cheese for authentic Tex-Mex flavor.
• Cheddar cheese – Sharp and rich, great for extra cheesiness.
• Monterey Jack – Melts beautifully, giving the casserole a smooth, creamy texture.
• Pepper Jack – Adds a mild spicy kick for those who love a little heat!

💡 Pro Tip: For a gooey, cheesy top, broil the casserole for 2 minutes after baking until golden brown and bubbly!

Conclusion: A Must-Try One-Pan Fajita Casserole

This Chicken Fajita Skillet Casserole is the perfect quick, flavorful, and satisfying meal that brings all the bold flavors of Tex-Mex fajitas in an easy-to-make, cheesy baked dish. Whether you’re looking for a low-carb dinner, a meal-prep-friendly recipe, or a fun twist on classic fajitas, this one-skillet meal has it all!

Why You’ll Love This Recipe:
✔ One-Pan Meal – Less cleanup, more flavor!
✔ Easy & Quick – Ready in just 30 minutes.
✔ Perfect for Meal Prep – Great for making ahead!
✔ Customizable – Adjust the spice level, add toppings, or make it keto-friendly.

So why wait? Try this Chicken Fajita Skillet Casserole today and enjoy a cheesy, flavor-packed dinner in no time!

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