Easy Chicken Fajita Rice Casserole

Ingredients for Chicken Fajita Rice Casserole

I have made this recipe more times than I can count, and over time I have landed on a combination of ingredients that just works every single time. Using a good fajita seasoning is the real shortcut here, and I always reach for low-sodium chicken broth so I can control the salt level myself.

• 2 cups long-grain white rice (or brown rice for extra fiber)
• 2 cups chicken broth — I recommend low-sodium so you control the salt
• 1.5 lbs boneless skinless chicken breast or thighs (thighs stay juicier, in my experience)
• 1 tablespoon olive oil
• 1 medium onion, sliced
• 1 red bell pepper, sliced
• 1 green bell pepper, sliced
• 1 yellow bell pepper, sliced
• 1 packet fajita seasoning (or 2 tablespoons) — my go-to is store-bought for convenience
• 1 cup shredded cheddar or Mexican blend cheese
• 1/2 cup black beans, drained and rinsed (optional)
• 1/2 cup corn, drained if canned (optional)
• 1/2 cup diced tomatoes, drained (optional)

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Step-by-Step Instructions

I recommend reading through all the steps before you start. In my experience, having everything prepped and ready makes this casserole come together smoothly with no stress at all.

Step 1: Heat olive oil in a large skillet over medium heat. Add the sliced onions and bell peppers. Cook for 5 to 7 minutes, stirring occasionally, until they are soft and lightly caramelized. Remove from heat and set aside.

Step 2: Season the chicken generously on both sides with fajita seasoning. In the same skillet over medium-high heat, sear the chicken for 3 to 4 minutes per side until golden brown. It does not need to be fully cooked through at this stage. Remove and cut into bite-sized pieces.

Step 3: Preheat your oven to 375 degrees F (190 degrees C). Lightly grease a 9×13-inch baking dish and spread the uncooked rice in an even layer across the bottom.

Step 4: Pour in the chicken broth, then add the seasoned chicken pieces and sauteed vegetables on top. Stir gently to combine everything. If using black beans, corn, or diced tomatoes, fold them in now. Make sure the rice is submerged in the broth for even cooking.

Step 5: Cover tightly with aluminum foil and bake for 35 to 40 minutes, until the rice is fully tender and the chicken reaches an internal temperature of 165 degrees F.

Step 6: Remove the foil and sprinkle the shredded cheese evenly over the top. Return to the oven uncovered for 5 to 10 minutes until the cheese is melted and bubbling. Let the casserole rest for 5 minutes before serving so everything sets up nicely.

What to Serve with Chicken Fajita Rice Casserole

The bold, smoky flavors of this dish pair beautifully with fresh, cool sides that balance out the richness. Here are some of the best pairings to round out your meal:

Warm Flour Tortillas: Scoop a spoonful of this casserole inside a soft flour tortilla and wrap it up for an instant fajita experience. It is a fun, interactive way to serve dinner, especially for kids. If you love that Tex-Mex vibe, our Easy Crockpot Chicken Fajitas use the same bold seasoning profile and make a great companion recipe.

Sour Cream and Guacamole: A cool dollop of sour cream or creamy guacamole cuts right through the cheesy, spiced casserole and adds a fresh, rich contrast that feels like a true restaurant-style fajita experience.

Simple Green Salad: A crisp romaine salad with lime vinaigrette and a sprinkle of cilantro brings brightness to the plate. If you want something a little heartier, our Street Corn Chicken Rice Bowl makes a fantastic salad-adjacent side that shares the same Tex-Mex spirit.

Cheesy Chicken and Rice Casserole Style Beans: Creamy refried beans or a side of Cheesy Chicken and Rice Casserole served alongside rounds out the meal with extra protein and a classic comfort food feel that works perfectly for weeknight family dinners.

Pico de Gallo or Fresh Salsa: Fresh tomato, onion, and cilantro salsa adds a juicy, vibrant pop of flavor that lifts every bite and makes the whole plate feel lighter. For another great Tex-Mex dinner to serve alongside or on another night, try our Sheet Pan Chicken Fajitas for a crispy, fast alternative.

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Storage and Serving Tips

Store any leftovers in an airtight container in the refrigerator for up to 4 days. The rice actually absorbs even more flavor overnight, which makes this a great make-ahead meal for busy weeks. I usually portion it into individual containers right away so lunch the next day is already handled.

To reheat, add a small splash of chicken broth or water before microwaving to keep the rice from drying out. Microwave individual portions for 2 to 3 minutes, stirring halfway through. To reheat the full dish, cover with foil and warm in a 325 degree F oven for about 15 minutes.

This chicken fajita rice casserole also freezes well for up to 2 months. Let it cool completely before transferring to a freezer-safe container. Thaw overnight in the refrigerator before reheating. Serve it straight from the dish family-style or spoon it into bowls and top with your favorite garnishes like sliced avocado, fresh lime, or chopped cilantro.

FAQs

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Easy Chicken Fajita Rice Casserole

A bold, cheesy, one-pan baked dinner loaded with seasoned chicken, colorful bell peppers, and fluffy rice. Ready in just one hour and perfect for busy weeknights.

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Prep Time 15 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr

Servings: 6 portions

Course: Dinner, Main Course

Cuisine: American, Tex-Mex

Calories: 400

Ingredients Equipment Method Notes

Ingredients

  

• 2 cups long-grain white rice or brown rice
• 2 cups chicken broth low-sodium recommended
• 1.5 lbs boneless skinless chicken breast or thighs cut into bite-sized pieces after searing
• 1 tbsp olive oil
• 1 medium onion sliced
• 1 red bell pepper sliced
• 1 green bell pepper sliced
• 1 yellow bell pepper sliced
• 2 tbsp fajita seasoning or 1 store-bought packet
• 1 cup shredded cheddar or Mexican blend cheese
• 0.5 cup black beans optional, drained and rinsed
• 0.5 cup corn optional, drained if canned
• 0.5 cup diced tomatoes optional, drained

Equipment

• 9×13-inch baking dish
• Large skillet
• Aluminum foil
• Sharp knife and cutting board
• Instant read meat thermometer

Method

 

1. Heat olive oil in a large skillet over medium heat. Add sliced onions and bell peppers and cook for 5 to 7 minutes, stirring occasionally, until softened and lightly caramelized. Remove from heat and set aside.
2. Season the chicken generously on both sides with fajita seasoning. Raise heat to medium-high and sear the chicken in the same skillet for 3 to 4 minutes per side until golden brown. Remove and cut into bite-sized pieces. The chicken does not need to be fully cooked through at this stage.
3. Preheat oven to 375 degrees F (190 degrees C). Lightly grease a 9×13-inch baking dish and spread the uncooked rice in an even layer across the bottom.
4. Pour in the chicken broth, then add the seasoned chicken pieces and sauteed vegetables. If using black beans, corn, or diced tomatoes, fold them in now. Stir everything gently to combine and make sure the rice is submerged in the broth.
5. Cover tightly with aluminum foil and bake for 35 to 40 minutes, until the rice is fully tender and the chicken reaches an internal temperature of 165 degrees F.
6. Remove the foil and sprinkle shredded cheese evenly over the top. Bake uncovered for an additional 5 to 10 minutes until the cheese is melted and bubbling. Let rest 5 minutes before serving.

Notes

For best results, use long-grain white or brown rice. Instant rice is not recommended as it turns mushy during the bake. Drain optional add-ins like black beans, corn, and diced tomatoes before adding to prevent excess liquid. This casserole stores in the refrigerator for up to 4 days and freezes for up to 2 months. Add a splash of broth when reheating to keep the rice moist.