Easy Chicken Burrito Casserole

This chicken burrito casserole has everything you love about burritos — seasoned rice, tender shredded chicken, black beans, corn, green chilies, and melted Monterey Jack — all baked together in one dish. It’s easy enough for a busy weeknight and good enough that everyone comes back for seconds.

Why You’ll Actually Love This

One dish, no fuss — everything goes into a single baking dish, including the uncooked rice
Big flavor without much work — fajita seasoning, tomato paste, and green chilies do all the heavy lifting
Flexible protein — use rotisserie chicken, leftover cooked chicken, or whatever you’ve got on hand
Leftovers are even better — the rice soaks up everything overnight and reheats beautifully
Crowd-pleaser — loaded with flavor without being too spicy, so the whole table is happy

On the Ingredients (A Few Thoughts)

The rice is the thing people overthink. Use parboiled long-grain brown rice — not instant, not regular raw brown rice, parboiled. It cooks up perfectly in the oven without turning mushy. I’ve used white long-grain rice in a pinch and that works too, but honestly the brown rice has more texture and feels more substantial.
Shredded chicken — use whatever you have. Rotisserie chicken from the store is completely fine. I’ve used the leftovers from a roast chicken, shredded it while still warm over the sink like some kind of feral home cook, and it worked perfectly. If you’re cooking chicken fresh, Instant Pot it, boil it, bake it, whatever. Just shred it.
Fajita seasoning — I have a homemade blend I’ve been using forever. I don’t actually measure it anymore, I just shake things until it smells right, which is not helpful advice but it’s the truth. Store-bought works. Taco seasoning works in a pinch, though it’s a slightly different flavor profile.
The green chilies are small can, mild, and they’re not optional in my opinion. They add something you can’t quite identify but would notice if it wasn’t there.
One thing I always do — and I don’t see this mentioned in a lot of recipes — is make sure your cheese is freshly shredded rather than the pre-shredded bag stuff. Pre-shredded has a coating on it that makes it not melt as nicely. Monterey Jack is the move here, not cheddar, not a blend. It gets this gorgeous golden crust.

Ingredients

About ½ cup finely diced onion (I usually do a full small onion, whatever that comes out to)
1 red bell pepper, diced
1 cup uncooked parboiled long-grain brown rice (or white long-grain)
3 tablespoons fajita seasoning, homemade or store-bought
⅛ teaspoon cayenne pepper — optional, skip it if you’ve got kids who complain
1 cup frozen corn kernels
1 can (14 oz) low-sodium black beans, drained and rinsed well
5 cups shredded cooked chicken
3 cups reduced-sodium chicken broth
1 small can (4 oz) mild green chilies
1 tablespoon olive oil
2 tablespoons tomato paste
1¼ cups shredded Monterey Jack cheese

Let’s Make It

Preheat your oven to 400°F. This is a hot oven — don’t do 375 thinking you’ll be gentle about it. It needs the heat to get the rice cooked through.
Into a large baking dish — I use a 9×13, it fits everything comfortably — add your diced onion, bell pepper, uncooked rice, fajita seasoning, and cayenne if you’re using it. Give it a stir. It’ll look oddly dry and like nothing interesting is happening yet. That’s fine.
In a separate bowl or big measuring cup, whisk together the chicken broth, green chilies, tomato paste, and olive oil. Get it actually combined — the tomato paste wants to clump and you have to be a little aggressive with it. Pour the whole thing over the rice mixture and stir again.
Now add your shredded chicken, black beans, and corn. One more stir to get everything distributed. It should look quite soupy at this point, which is exactly what you want — the rice needs all that liquid.
Cover tightly with aluminum foil. This part matters. If the foil’s loose, the steam escapes and the rice cooks unevenly. Put it in the oven for about 65 to 70 minutes. I do 70 in my oven, which runs slightly cool, but check it at 65. You’re looking for the liquid to be mostly absorbed and the rice to be tender.
Here’s the thing — if it’s still soupy when you pull it out, don’t panic. Give it a stir to redistribute, re-cover, and put it back in for another 10 minutes. It happens sometimes depending on your oven, your dish, the moisture content of the chicken. It’s fine. The rice will catch up.
Once the liquid’s absorbed, pull it out and scatter the Monterey Jack evenly over the top. Back into the oven, uncovered, for 5 to 10 minutes until the cheese is melted and has spots of golden brown. Watch it — this is the one moment where things can go from “beautifully browned” to “oops” in about two minutes.
Let it rest for at least 5 minutes before you serve it. I know you won’t want to. Tell everyone it needs to cool. They’ll survive.

What You Can Change

Ground beef works here instead of chicken if you want a beef burrito casserole. I’ve done it. It’s a different vibe — heavier, richer — but it’s good. Just brown and drain the beef before you add it.
For a vegetarian version, you could skip the chicken entirely and double the beans, or throw in some garbanzo beans. You’d probably want to reduce the broth slightly since chicken carries moisture. I’ve done this a couple of times and it works out okay. The flavor’s not quite as deep but it’s still satisfying.
The cheese on top could be any good melting cheese — pepper jack if you want more heat, or just a mild cheddar in a pinch. I’ve even done this without any cheese when I was being strict about something, though I wouldn’t recommend it emotionally.

Storage,

This keeps well in the fridge for four to five days in an airtight container. I portion it out into individual containers right away so reheating is easy — just microwave for three to four minutes, add your toppings fresh.
It freezes fine too, up to about three months. Cool it completely in the fridge first before transferring to the freezer. Don’t try to freeze it warm, it gets weird. Thaw overnight in the fridge, reheat thoroughly.
If you’re making this ahead — like assembling it in the morning to bake at dinner — keep the broth mixture separate in the fridge and combine everything right before it goes in the oven. I tried assembling the whole thing at once and refrigerating it and the rice started absorbing liquid prematurely. Learned that the unfortunate way.

Serve it with whatever you’d put on a burrito. Sour cream, salsa, sliced avocado, pickled jalapeños, a squeeze of lime, cilantro if you like it (I know it’s divisive). Crushed tortilla chips on top add a nice crunch if you want something extra.