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Chicken Fajita Casserole: When Your Favorite Mexican Restaurant Moves Into Your Oven


  • Author: Tyla
  • Total Time: 1 hour 5 minutes
  • Yield: 8-10 1x

Description

You know that moment when you’re craving fajitas but you’re also craving the comfort of a good old-fashioned casserole? Like, you want all those sizzling peppers and onions and perfectly seasoned chicken, but you also want it bubbling away in a dish that screams “cozy night in.” Well, congratulations, because this chicken fajita casserole is basically the answer to that very specific but totally reasonable craving.

We’re talking layers of tender, spice-rubbed chicken, sweet bell peppers, caramelized onions, and perfectly seasoned rice, all topped with a blanket of melted cheese that gets golden and bubbly in the oven. It’s like someone took everything you love about fajita night and turned it into the world’s most satisfying one-pan dinner.


Ingredients

Scale

For the Chicken & Seasonings:

  • 2 lbs boneless, skinless chicken breasts or thighs, cut into bite-sized pieces
  • 2 tbsp olive oil
  • 2 tsp chili powder
  • 1 tsp cumin
  • 1 tsp paprika
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 1/2 tsp oregano
  • 1/2 tsp salt
  • 1/4 tsp cayenne pepper (adjust to your heat tolerance)

For the Veggie Situation:

  • 1 large red bell pepper, sliced
  • 1 large yellow bell pepper, sliced
  • 1 large green bell pepper, sliced (because we’re going full rainbow)
  • 1 large onion, sliced
  • 3 cloves garlic, minced
  • 1 jalapeño, seeded and diced (optional but recommended)

For the Rice Base:

  • 1 1/2 cups long-grain white rice, uncooked
  • 1 can (14.5 oz) diced tomatoes, drained
  • 1 can (4 oz) diced green chiles
  • 2 1/2 cups chicken broth
  • 1 can (15 oz) black beans, drained and rinsed
  • 1 cup frozen corn kernels

For the Cheese Situation:

  • 2 cups shredded Mexican cheese blend
  • 1/2 cup shredded sharp cheddar
  • 1/4 cup crumbled queso fresco (optional but fancy)

For the Finishing Touches:

  • 1/4 cup fresh cilantro, chopped
  • 2 green onions, sliced
  • 1 lime, cut into wedges
  • Sour cream for serving
  • Sliced avocado (because everything’s better with avocado)

Instructions

Step 1: Season Like You Mean It

Preheat your oven to 375°F. Mix all the chicken seasonings in a small bowl. Toss chicken pieces with olive oil and seasoning mix until every piece is coated. Let it hang out while you prep everything else — flavor needs time to mingle.

Step 2: Sear That Chicken

Heat a large oven-safe skillet or Dutch oven over medium-high heat. Add seasoned chicken and cook for 5-6 minutes until golden (don’t worry about cooking through). Remove chicken and set aside — it’ll finish cooking in the oven.

Step 3: Veggie Party Time

In the same pan (don’t clean it — those browned bits are flavor gold), add bell peppers and onion. Cook for 5-7 minutes until they start to soften and get slightly caramelized. Add garlic and jalapeño, cook for another minute until fragrant.

Step 4: Build the Base

Add uncooked rice to the pan and stir for 1-2 minutes to toast it slightly. Add diced tomatoes, green chiles, and chicken broth. Stir in black beans and corn. Bring to a simmer, then remove from heat.

Step 5: The Beautiful Assembly

Nestle the seared chicken pieces back into the rice mixture. Cover tightly with foil (this is crucial for proper rice cooking). Pop it in the oven for 25-30 minutes until rice is tender and liquid is absorbed.

Step 6: Cheese It Up

Remove foil and sprinkle both cheeses evenly over the top. Return to oven, uncovered, for 10-15 minutes until cheese is melted and bubbly. Let it rest for 5 minutes — patience, grasshopper.

Step 7: Serve Like the Casserole Champion You Are

Sprinkle with fresh cilantro and green onions. Serve with lime wedges, sour cream, and avocado slices. Watch everyone come back for seconds (and thirds).

Notes

Rice Cooking 101: Don’t lift that foil during cooking — you’ll release the steam and end up with crunchy rice.

Chicken Thighs vs. Breasts: Thighs stay more tender, but breasts work great too. Your call.

Veggie Prep: Cut everything roughly the same size so it cooks evenly.

Cheese Timing: Add cheese only in the last 15 minutes to prevent it from getting rubbery.

Liquid Levels: If your rice looks too dry after 20 minutes, add a splash more broth.

  • Prep Time: 20 minutes
  • Cook Time: 45 minutes

Nutrition

  • Calories: ~485 kcal
  • Fat: ~15g
  • Carbohydrates: ~52g
  • Protein: ~32g