Let’s be real—some days, you open your fridge, spot chicken and veggies, and think, “Again?!” I hear you. That’s why I’m so excited to share my Creamy Baked Fajita Chicken Casserole, the kind of dish that swoops in to save dinner from the boring-zone and leaves everyone at your table cheering for seconds.
Creamy, spicy, cheesy…and oh-so-easy, this casserole turns simple chicken and bell peppers into a hearty meal bursting with Tex-Mex vibes. Whether you’re feeding hungry kids, impressing friends, or just craving something cozy, this is one of those recipes that feels like a warm hug—without chaining you to the stove for hours.
So if you’re craving bold flavors but need dinner on the table fast, you’re in the right place. Let’s get cooking!
Table of Contents
Why You’ll Love This Creamy Baked Fajita Chicken Casserole
- Fast and fuss-free. Prep it in minutes, toss it in the oven, and relax.
- Family-friendly. Mild spice, creamy sauce, and gooey cheese make even picky eaters happy.
- Versatile. Serve it over cauliflower rice, pasta, or wrapped in tortillas.
- Low-carb option. Perfect for those keeping carbs in check but still wanting big flavors.
Ingredients You’ll Need
- 2 large boneless, skinless chicken breasts, cut into cubes
- 2 bell peppers (red, green, or yellow), seeded and sliced into strips
- 1 medium onion, minced
- 8 oz (225 g) cream cheese, softened
- 1/3 cup tomato sauce (marinara, crushed tomatoes, or your favorite)
- 1/4 cup chicken stock (or substitute water + 1 teaspoon instant bouillon)
- 1 packet fajita seasoning (or homemade—see Tips below!)
- 1/2 teaspoon salt and black pepper
- 1 tablespoon vegetable oil
- 1 cup shredded mozzarella (or Pepper Jack, Monterey Jack, cheddar—go wild!)
- Fresh chopped cilantro or parsley for garnish
How to Make Creamy Baked Fajita Chicken Casserole
Step 1: Get things heated.
Preheat your oven to 400°F (200°C). Lightly oil a baking dish so nothing sticks (and because nobody likes scrubbing dishes after dinner).
Step 2: Mix the creamy magic.
In a bowl, beat together the softened cream cheese, tomato sauce, chicken stock, half the fajita seasoning, salt, and pepper. It’ll look a little weird at first—don’t panic. It’ll come together into a smooth, dreamy sauce.
Step 3: Toss the chicken.
In your baking dish, add the cubed chicken. Sprinkle it with the remaining fajita seasoning and toss so every piece gets some spice love.
Step 4: Assemble the layers.
Pour the creamy fajita mixture over the chicken and stir to coat everything evenly. Scatter your sliced bell peppers and minced onion on top. Sprinkle shredded cheese generously over the veggies because, let’s be honest, cheese makes everything better.
Step 5: Bake!
Pop the dish into the oven for about 15-25 minutes, depending on how big your chicken pieces are. You’re looking for the chicken to hit an internal temp of 165°F (74°C). If you’re a fan of crispy cheese tops (who isn’t?), broil for an extra 2 minutes at the end.
Step 6: Serve and enjoy.
Serve immediately over cauliflower rice, steamed veggies, zucchini noodles, or just dig in as is. Sprinkle chopped cilantro or parsley on top for a pop of color and freshness.
Aneta’s Tips for Perfect Creamy Baked Fajita Chicken Casserole
- Make your own fajita seasoning! Combine 1 teaspoon chili powder, ½ teaspoon paprika, ½ teaspoon cumin, ¼ teaspoon garlic powder, ¼ teaspoon onion powder, and a pinch of cayenne for DIY spice magic.
- Cheese swap. Pepper Jack adds a spicy kick. Cheddar brings classic comfort. Or use a Mexican blend for extra melty goodness.
- Veggie variation. Add mushrooms, spinach, or zucchini if you’re cleaning out the fridge.
- Leftover magic. This casserole tastes even better the next day. Stuff leftovers into tortillas for easy lunch wraps.
A Little Story from My Kitchen
This recipe actually became a hero in my kitchen after a hectic Tuesday when I forgot to grocery shop and only had chicken, peppers, and cream cheese left. I tossed them together in the oven, crossed my fingers, and… my kids declared it “the best chicken ever.” Now it’s on repeat at my house—and I hope it becomes a regular at yours, too!

FAQs About Creamy Baked Fajita Chicken Casserole
Can I substitute chicken thighs instead of breasts?
Absolutely! Thighs stay extra juicy and bring great flavor. Just cut them into similar-sized pieces and keep an eye on cook time.
Is this recipe spicy?
It’s mildly spicy as written. If you like more heat, add extra chili powder or swap in Pepper Jack cheese.
How do I store leftovers?
Cool leftovers completely and store in an airtight container in the fridge for up to 3 days. Reheat gently in the microwave or oven until hot.
Can I freeze this casserole?
Yes! Assemble it up to the point before baking, cover tightly, and freeze. When ready to cook, thaw overnight and bake as directed.
Let’s Bring Some Magic to Dinner
There’s nothing quite like a Creamy Baked Fajita Chicken Casserole to transform an ordinary weeknight into a delicious fiesta. It’s comforting, bold, and endlessly versatile—and if your family’s anything like mine, you’ll barely have leftovers. Give it a try this week, and let the creamy, cheesy magic work its charm!
More Delicious Recipes to Try Next
If you loved this Creamy Baked Fajita Chicken Casserole, here are some other irresistible chicken dishes you’ll definitely want to add to your weekly rotation:
- For another flavor-packed Tex-Mex dinner, check out my Mexican Rotisserie Chicken Tostadas—they’re crunchy, fresh, and perfect for busy nights.
- Craving more cozy casseroles? You’ll adore my Chicken Rice-A-Roni Casserole for its creamy texture and easy prep.
- If you’re in the mood for a creamy pasta twist, my Creamy Chicken and Corn Pasta is a weeknight lifesaver full of comforting flavors.
- Or dive into more spicy, hearty goodness with this satisfying Chicken Burrito Casserole—it’s a crowd-pleaser every single time.
Happy cooking, and don’t forget to explore the magic of chicken in all its delicious forms!
Print
Creamy Baked Fajita Chicken Casserole
- Total Time: 30 mins
- Yield: 4 servings 1x
Description
Creamy Baked Fajita Chicken Casserole is the ultimate weeknight dinner hero. Juicy chicken, colorful peppers, and a velvety, spicy cream sauce come together under a blanket of melted cheese for a comforting, flavorful meal that’s easy to throw together—and guaranteed to impress the whole family!
Ingredients
2 large chicken breasts, skinless, boneless, cut into cubes
2 bell peppers (red, green, or yellow), seeded and sliced into strips
1 medium onion, minced
8 oz (225 g) cream cheese, softened
1/3 cup tomato sauce (marinara, crushed tomatoes, or your favorite)
1/4 cup chicken stock (or substitute water + 1 teaspoon instant bouillon)
1 packet fajita seasoning (or homemade blend)
1/2 teaspoon salt and black pepper
1 tablespoon vegetable oil
1 cup shredded mozzarella cheese (or Pepper Jack, Monterey Jack, cheddar)
Fresh chopped cilantro or parsley for garnish
Instructions
Preheat your oven to 400°F (200°C). Lightly oil a baking dish.
In a bowl, beat together the softened cream cheese, tomato sauce, chicken stock, half the fajita seasoning, salt, and pepper until smooth.
Add the cubed chicken to the prepared baking dish. Sprinkle with the remaining fajita seasoning and toss to coat evenly.
Pour the creamy fajita mixture over the chicken and stir well to coat all pieces.
Arrange bell pepper strips and minced onion evenly over the top.
Sprinkle shredded cheese generously over the veggies.
Bake for 15-25 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (74°C).
Optional: Broil for 2 minutes at the end for a golden, crispy cheese topping.
Serve hot over cauliflower rice, steamed veggies, zucchini noodles, or enjoy as-is. Garnish with fresh cilantro or parsley.
Notes
DIY Fajita Seasoning: Mix 1 teaspoon chili powder, ½ teaspoon paprika, ½ teaspoon cumin, ¼ teaspoon garlic powder, ¼ teaspoon onion powder, and a pinch of cayenne.
Swap chicken breasts for chicken thighs for extra juiciness.
Try different cheeses for a fun twist—Pepper Jack for heat, cheddar for extra richness.
Leftovers taste even better the next day and make delicious wraps!
- Prep Time: 10 mins
- Cook Time: 20 mins
- Category: Dinner, Casserole
- Method: Baking
- Cuisine: Tex-Mex
Nutrition
- Serving Size: 1 serving
- Calories: 420 kcal
- Sugar: 5 g
- Sodium: 950 mg
- Fat: 28 g
- Saturated Fat: 13 g
- Unsaturated Fat: 13 g
- Trans Fat: 0 g
- Carbohydrates: 10 g
- Fiber: 2 g
- Protein: 33 g
- Cholesterol: 120 mg