Enjoy a satisfying oven meal featuring tender shredded chicken, creamy rice, and colorful peppers. This dish brings bold fajita flavors with a touch of spice from diced tomatoes and chilies. The mixture comes together with sour cream, fajita seasoning, and plenty of shredded cheese, all baked to melty, bubbly perfection. Simple steps ensure even busy nights result in a hearty, crowd-pleasing family dinner. Serve warm for a comforting, all-in-one meal straight from your kitchen.

Fajita chicken casserole brings the sizzle and flavor of classic Tex-Mex fajitas into one easy oven-baked meal that is perfect for busy nights or casual gatherings. Packed with juicy chicken, vegetables, creamy sauce, and a generous layer of cheese, this is a true crowd-pleaser that goes from pantry to table with minimal fuss.
Why You’ll Love This Recipe
- Ready in just under an hour with little hands-on time
- Perfect way to use up leftover or rotisserie chicken
- Customizable with your favorite add-ins or toppings
- One-dish meal means fewer dirty dishes to wash
I first whipped this up on a night when my family was craving fajitas but no one wanted to stand at the stove. It became an instant hit with big flavors and a cozy, gooey texture.
Ingredients
- Shredded cooked chicken: Gives the dish hearty protein and soaks up all the bold flavors. I usually use rotisserie for convenience and tenderness.
- Instant rice: Ensures everything cooks evenly and absorbs all the savory liquid. Check for grains that are plump and not cracked.
- Cream of chicken soup: Adds a rich, velvety texture that holds the filling together. Look for a low-sodium variety if you prefer.
- Sour cream: Brings a touch of tanginess and helps keep everything creamy without being heavy. Choose one with a thick, smooth texture.
- Frozen diced onion and bell pepper blend: Saves time and guarantees consistent flavor. Make sure the veggies are evenly diced and not icy.
- Diced tomatoes with chilies: Undrained adds zesty heat and juiciness. Use a well-known brand for reliable spice and tomato quality.
- Chicken broth: Keeps everything moist and infuses even more flavor. Go for a rich broth that is not too salty.
- Fajita seasoning: Ties the whole dish together with smoky and savory spices. Fresh packets set the flavor profile in just one step.
- Shredded Mexican blend cheese: Delivers the melty, stretchy finish that everyone loves. The best blends use Monterey Jack for extra meltiness.
Step-by-Step Instructions
Prepare the Dish:Spray a nine by thirteen inch casserole dish with nonstick spray so the casserole lifts out cleanly and does not stick on the edges.Mix the Casserole Base:In a roomy mixing bowl blend the shredded chicken with uncooked instant rice. Stir in the cream of chicken soup and sour cream until smooth. Add the frozen onion and bell pepper blend straight from the freezer for efficiency. Pour in the entire can of diced tomatoes with chilies including the liquid to boost flavor. Stir in the chicken broth to provide the proper moisture and cook the rice. Sprinkle the fajita seasoning over and fold in about half the shredded cheese for that signature gooey result. Combine thoroughly until everything is coated and evenly mixed.Assemble:Scoop the casserole mixture into your prepared pan and use a spatula to spread it evenly corner to corner. This step ensures every bite has a bit of chicken rice and veggies.Bake Covered:Cover the casserole tightly with foil so the steam cooks the rice and melds the flavors. Place in a preheated oven set to three hundred fifty degrees Fahrenheit. Bake for thirty five minutes to let all the flavors develop and ensure the rice is nearly tender.Add Cheese and Finish Baking:Take off the foil and scatter the remaining cheese all over the top. Place back in the oven and bake uncovered for about ten minutes until the cheese is melted and bubbling and the edges start to become golden brown. Let it rest a few minutes before serving so it sets just enough for scooping.

You Must Know
- High in protein and filling enough for dinner on its own
- Great make ahead option that reheats beautifully
- Flexible for picky eaters and easy to adapt to what you have on hand
My favorite part is the combination of tangy sour cream and spicy chilies with the creamy chicken. My family always goes for second helpings and we have fond memories of serving this at our neighbor’s potluck where it disappeared in record time.
Storage Tips
This casserole keeps very well in the fridge for up to four days in an airtight container. I find flavors actually develop and improve by the next day. To reheat individual portions microwave gently with a splash of broth or water to keep the rice from drying out. For freezing wrap tightly and freeze up to three months. Thaw overnight in the refrigerator and reheat in the oven for best results.
Ingredient Substitutions
Swap the chicken for turkey or ground beef for a different spin. You can use Greek yogurt instead of sour cream if you want extra protein and a tangier finish. Try canned black beans or corn stirred in with the rice mixture for a bigger meal or extra fiber. If you prefer fresh onions and peppers just sauté them to soften before mixing.
Serving Suggestions
Serve hot straight from the pan with extra toppings like sliced avocado chopped cilantro or a squeeze of lime. I love offering tortilla chips for scooping or wrapping spoonfuls in warm flour tortillas for fajita style tacos at the table.

Pro Tips
- Taste your fajita seasoning before adding as spice levels can really vary from brand to brand
- Let the casserole rest a few minutes after baking so it sets and slices more easily
- For crispier cheese broil the casserole for a couple minutes at the end but watch closely
When you need a no-fuss meal that still brings great flavor fajita chicken casserole always comes through. Every time I make it I am reminded that comfort food does not mean complicated and the best dishes often come from simple tweaks on nostalgic favorites.

Fajita Chicken Casserole Bake
Prep Time
15 min
Cook Time
45 min
Total Time
60 min
Skill Level:Easy
Cuisine:Tex-Mex
Yield:8 Servings
Dietary Categories:~
Ingredients
→ Main Ingredients
960 g shredded cooked chicken breast
380 g instant rice
300 g canned cream of chicken soup
240 g sour cream
130 g frozen diced onion and bell pepper blend
284 g canned diced tomatoes with chilies, undrained
360 ml chicken broth
32 g fajita seasoning mix
225 g shredded Mexican blend cheese
Steps
Lightly grease a 33×23 cm casserole dish with nonstick spray to prevent sticking.
In a large mixing bowl, add shredded chicken, uncooked instant rice, cream of chicken soup, sour cream, frozen diced onion and bell pepper blend, undrained diced tomatoes with chilies, chicken broth, fajita seasoning, and half of the shredded cheese. Mix thoroughly until the ingredients are homogeneous.
Evenly spread the combined mixture into the prepared casserole dish, smoothing the top with a spatula.
Cover the casserole dish tightly with aluminium foil and bake in a preheated oven at 175°C for 35 minutes.
Remove the foil, sprinkle the remaining shredded cheese over the surface, and return to the oven. Bake uncovered for an additional 10 minutes until the cheese is fully melted and bubbling.