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Fajita Chicken Casserole

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If you’re searching for a quick, comforting, and budget-friendly weeknight dinner, this Fajita Chicken Casserole is the perfect solution. Packed with shredded chicken, creamy sauce, fajita seasoning, and melted cheese, this dish combines all the bold flavors of fajitas in an easy baked casserole. It’s a one-pan recipe that saves time while delivering maximum taste, making it a family favorite for busy households.

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This casserole not only satisfies cravings but also uses pantry staples like instant rice, canned soup, and frozen veggies—keeping it affordable and convenient. Whether you’re meal-prepping, hosting a casual dinner, or looking for a kid-friendly meal, this recipe is sure to become a regular on your table.

Why You’ll Love This Recipe

There are plenty of reasons why this fajita chicken casserole deserves a spot in your weekly dinner lineup:

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  • One-dish convenience: Everything bakes together in one casserole dish—minimal cleanup required.
  • Family-friendly: Creamy, cheesy, and full of flavor that even picky eaters will love.
  • Customizable: Swap proteins, vegetables, or spice levels to fit your family’s tastes.
  • Meal-prep ready: Stores well in the fridge or freezer, making it ideal for busy weeks.

Ingredients Breakdown

Understanding the key ingredients will help you get the best results:

  • Shredded chicken: A great way to use up leftover chicken or rotisserie chicken. Tender, juicy, and packed with protein.
  • Instant rice: Saves time while ensuring a fluffy texture. Regular rice won’t cook the same way in this recipe.
  • Cream of chicken soup: Adds creaminess and depth of flavor. Substitute with cream of mushroom for a variation.
  • Sour cream: Provides tanginess and richness, balancing the spices.
  • Onion and bell pepper blend: A time-saving shortcut that delivers classic fajita flavors without chopping.
  • Diced tomatoes with chilies (Ro*Tel): Infuses the casserole with a zesty, slightly spicy kick.
  • Chicken broth: Keeps the rice moist and enhances flavor.
  • Fajita seasoning: The star ingredient, adding smoky, bold fajita spices. Homemade or store-bought works well.
  • Mexican blend cheese: Melts beautifully on top and inside the casserole for that gooey, cheesy finish.

Tips and Tricks

  • Always shred chicken while it’s warm—it makes the process much easier.
  • Cover the dish tightly with foil during baking to keep the rice tender and prevent drying.
  • For extra flavor, sauté the onion and pepper blend before mixing it into the casserole.
  • Use freshly grated cheese instead of pre-shredded for better melt and flavor.

Variations and Customizations

Make this casserole your own with these fun twists:

  • Protein swaps: Substitute chicken with ground beef, ground turkey, or leftover steak.
  • Low-carb version: Replace rice with cauliflower rice for a lighter meal.
  • Vegetarian option: Skip the chicken and double the veggies or add black beans.
  • Spice control: Add jalapeños for heat or use mild diced tomatoes for less spice.

Pairing Suggestions

This hearty casserole pairs wonderfully with Tex-Mex sides:

  • Fresh garden salad with lime vinaigrette
  • Mexican street corn (Elote)
  • Refried beans or black beans
  • Warm flour or corn tortillas
  • Chips and homemade guacamole

Storage Instructions

  • Refrigerator: Store leftovers in an airtight container for up to 4 days.
  • Freezer: Freeze portions in freezer-safe containers for up to 2 months. Thaw overnight in the fridge before reheating.
  • Reheating: Warm in the oven at 350°F until hot, or microwave individual servings for quick meals.

Popular Questions

1. Can I make this casserole ahead of time?
Yes, assemble the casserole (without baking), cover tightly, and refrigerate for up to 24 hours before baking.

2. Do I need to cook the rice before adding it?
No, instant rice cooks perfectly in the oven with the broth and creamy sauce.

3. Can I use fresh vegetables instead of frozen?
Absolutely! Just chop onions and peppers, then sauté lightly before mixing them into the casserole.

Fajita Chicken Casserole
Caroline

Fajita Chicken Casserole

A hearty, Tex-Mex inspired casserole loaded with shredded chicken, rice, peppers, tomatoes, and fajita seasoning, all baked together with a creamy sauce and melted cheese for a family-friendly dinner.
Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings: 8 servings
Course: Main Course
Cuisine: Tex-Mex
Calories: 365

Ingredients
  

  • 4 cups shredded cooked chicken (about 3 large breasts)
  • 2 cups instant rice
  • 1 can (10.5 oz) cream of chicken soup
  • 1 cup sour cream
  • 1 cup frozen diced onion and bell pepper blend
  • 1 can (10 oz) diced tomatoes with chilies, undrained
  • 1 1/2 cups chicken broth
  • 1 packet (1.12 oz) fajita seasoning
  • 8 oz (about 2 cups) shredded Mexican blend cheese

Equipment

  • 9×13 casserole dish
  • large mixing bowl
  • measuring cups and spoons
  • aluminum foil

Method
 

  1. Preheat your oven to 350°F. Lightly grease a 9×13 casserole dish.
  2. In a large bowl, combine shredded chicken, instant rice, cream of chicken soup, sour cream, onion and pepper blend, diced tomatoes with chilies, chicken broth, fajita seasoning, and half of the cheese. Mix until fully combined.
  3. Spread the mixture evenly into the prepared casserole dish. Cover with foil and bake for 35 minutes.
  4. Remove the foil, sprinkle the remaining cheese over the top, and bake uncovered for an additional 10 minutes, or until the cheese is melted and bubbly.
  5. Allow the casserole to rest for 5 minutes before serving.

Notes

  • This recipe works best with cooked, shredded chicken—rotisserie chicken is a quick shortcut.
  • For a creamier texture, add an extra ½ cup sour cream.
  • Serve with a squeeze of fresh lime juice for a bright finish.

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