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Bold, smoky flavor meets effortless comfort in this chicken quinoa casserole. Picture: tender chicken, fluffy quinoa, plump black beans, sweet corn, and melty cheese layered together with just the right amount of Mexican spice and baked to bubbly perfection. It’s everything you could want in a casserole—filling, nourishing, and wildly satisfying, without feeling heavy.

“I have made this recipe numerous times and it is always a hit! Thanks for sharing!!!”

– SUSAN
Overhead photo of Mexican quinoa casserole garnished with chopped cherry tomatoes, sliced avocados and fresh cilantro.

Update: This recipe was originally published in January 2019. I made updates to the article below to include more information about this quinoa casserole with chicken.

Hi, friends! If the word casserole evokes mental images of sad vegetables and rubbery chicken swimming in thick, cream-of-something soup in a 9×13-inch baking dish, rest assured this quinoa casserole delivers deliciously BIG Tex-Mex flavor with minimal effort—and maximum repeat potential:

Table of Contents

About this quinoa casserole

Say hello to your new favorite casserole where wholesome goodness meets Mexican deliciousness and the perfect amount of gooey cheese.

Imagine: fluffy quinoa mingling with tender, shredded chicken, mild green chiles, sweet roasted kernels of corn, hearty black beans, bright salsa verde, and warm spices—all topped with a duo of melty cheeses and baked into a warm, bubbly masterpiece. Hearty and nourishing, it’s the perfect dinner fix when you’re craving Mexican food, but you also want a dose of feel-good eats.

Best of all, you just need simple ingredients and 15 minutes of prep—simply cook the quinoa, toss everything into a casserole dish, top with shredded cheese, bake, and devour. Truly, dinner doesn’t get any easier or more delish than this Mexican quinoa casserole with chicken.

Why this recipe works!

This quinoa chicken casserole checks all the box—and here’s why:

  • BIG Flavor, Little Effort. Savory chicken and quinoa meet sweet corn, earthy beans, tangy green chiles, zesty green salsa, smoky spices, and rich cheese—all in one forkful.
  • Deliciously Balanced Texture. Fluffy quinoa + tender chicken + creamy beans + juicy corn + gooey cheese = every bite feels satisfying and complete.
  • Easy, One-Dish Magic. The beauty of this quinoa casseroles—everything cooks together, building flavor while saving you effort and dirty dishes.
  • Customizable, Family-Friendly, All-Season Recipe. Top with avocado, sour cream, cilantro, or pico de Gallo. Regardless of how you dish it up, kids love the cheesy top, adults love the bold Mexican flavors, and it’s easy enough to spice up for heat lovers.
  • Meal Prep-able. Leftovers reheat beautifully and taste even better the next day.

Love Mexican food? Check out these Baja Tacos with chicken next.

Overhead photo of a large mixing bowl filled with cooked quinoa, shredded chicken, black beans, roasted corn, green chiles, Mexican seasonings, and shredded cheeses - before stirring.

Ingredients for mexican quinoa casserole

Below is everything you’ll need to make the ultimate quinoa casserole:

  • Quinoa. Light, fluffy, and protein-rich, quinoa is the backbone of this recipe. Swap: Any cooked grain, such as white rice, brown rice, or farro will work too, just skip the second step of the recipe.
  • Cooked Chicken. Adds lean protein, savory flavor, and hearty texture. Rotisserie chicken works great for a shortcut, but any cooked chicken (breasts or thighs) works great here. I personally love using this cumin chicken. Swap: If you prefer a different protein, ground beef, leftover sliced steak, or cooked turkey work as well.
  • Salsa Verde. Infuses the quinoa with a deeply rich, bright and tangy flavor. Swap: Green enchilada sauce.
  • Onion. Provides a foundational savory aromatic base of flavor.
  • Corn. Adds pops of natural sweetness and juicy texture. I like roasted corn here, but any fresh, canned, or frozen and thawed variety will work.
  • Black Beans. Give the casserole a creamy texture, earthy-savory flavor, and boost of fiber.
  • Diced Green Chiles. Add a touch of tangy mild heat without overpowering the spices.
  • Mexican Seasonings. Garlic powder lends an aromatic kick, ground cumin gives warmth, and chili powder brings a little heat, while kosher salt and ground black pepper enhance all the delicious flavors.
  • Shredded Cheese. Shred blocks of cheese yourself for the best melty, gooey finish that makes this casserole truly irresistible. I like Monterey Jack or Colby Jack and Mozzarella here, but cheddar or a mexican blend works great, too. 

Recipe variations

This quinoa and chicken casserole is fairly versatile. Below are a few variations to inspire: 

  • Vegetarian Quinoa Casserole: Skip the chicken and double up on the black beans or toss in roasted veggies, such as bell peppers, zucchini, and/or mushrooms.
  • Spicy Version: Add chopped jalapeño peppers or a chipotle pepper in adobo and use a medium-hot verde salsa. Also consider garnishing the top of the casserole with a drizzle of your favorite hot sauce for extra heat.
  • Creamy Casserole Twist: Mix a spoonful of plain Greek yogurt or sour cream into the quinoa mixture before baking.
  • Extra-Cheesy Quinoa Bake: Add a layer of shredded cheese in the middle and also on top for extra gooey goodness.

Leftover quinoa? Put it to good use here: Broccoli and Cheese Tots and/or Stir Fried Quinoa and Salmon.

Overhead photo of quinoa chicken casserole topped with pico de Gallo and diced avocados in a brown baking dish.

Professional chef expert tips for perfect results every time

As a professionally trained and restaurant-experienced chef, here are my top secrets for success:

  • Use Pre‑Cooked Chicken. Rotisserie chicken is a real time saver here, but any cooked chicken (leftovers, packaged cubed chicken, etc.) saves time and adds great flavor.
  • Rinse Quinoa. Be sure to rinse the quinoa in a fine mesh strainer until the water runs clear. This helps remove the natural saponins which are bitter in flavor.
  • Taste Before Baking. Quinoa is like a mild savory sponge, absorbing flavor beautifully. Everything in the casserole is already fully cooked, so give the mixture a taste before baking and don’t be scared to be generous with the seasonings. 
  • Don’t Overbake. You’re just heating everything through, so bake *just* until bubbly and golden to keep the casserole moist and delicious.
  • Let Rest Before Serving. This time helps the casserole hold together better before scooping and serving.
  • Add Fresh Lime for Brightness. A touch of fresh lime juice will brighten up all the flavors.
  • Garnish Before Enjoying. Remember, you eat with your eyes first. A scattering of chopped avocado, fresh cilantro, and a dollop sour cream can take this chicken quinoa casserole from good to great.

Step-by-step photos: making this recipe at home

Below you will find a picture collage showing you exactly how to make this quinoa casserole recipe with chicken, step-by-step. Please scroll down for the printable recipe card, which contains detailed instructions and measurements.

Overhead photo collage of how to make Mexican Chicken Casserole recipe step by step with written instructions on each step.

FAQs: frequently asked questions

You’ve got questions? I’ve got answers! If you have a question you don’t see listed below, please drop them in the comments section. I’m happy to help when I can! 

What kind of quinoa works best?

Whatever variety of quinoa you prefer will work great here. white or tri-colored quinoa cooks evenly and creates a great texture, while red quinoa has a slightly firmer bite.

Can I use pre-cooked quinoa?

You can absolutely use leftover or pre-cooked quinoa in this casserole recipe! Just skip the second step of the recipe, which calls for cooking the quinoa.

What’s the best chicken to use?

You can use any type of cooked chicken meat. Rotisserie chicken is the easiest and gives a great mix of both white and dark meat, but truthfully any cooked shredded or diced chicken will work in this casserole.

How can I make it vegetarian or vegan?

Sure. Just skip the chicken and and use tofu, jackfruit, soy curls, roasted veggies, or extra beans. And, swap out the regular shredded cheeses for your favorite dairy-free cheese substitutes. 

Can I make this quinoa chicken casserole ahead of time?

Absolutely. Just mix the ingredients, dump into a greased casserole dish, cover, and refrigerate—then bake the mexican quinoa casserole when ready.

Action photo of two spoons serving a quinoa mexican bake from a large casserole dish.

Serving chicken casserole with quinoa

Satisfying and wholesomely delicious, this Mexican quinoa casserole with chicken eats like a complete meal, yet plays well with a variety of sides. Below are some serving suggestions to inspire:

Unique serving suggestions

  • Serve with Beans. Make it a hearty and satisfying meal by serving alongside charro pinto beans or a bean salad Mexican style.
  • Make a Taco Bowl. Spoon the Mexican casserole over a bed of greens for a salad style presentation and serve it in a tortilla bowl for added crunch.
  • Tex-Mex Style Serving. Top with crushed tortilla chips or nacho cheese Doritos for a fun walking nachos or tacos-style serving.
  • Brunch Style Serving. Drizzle with hot sauce and top with few fried eggs for a delicious brunch casserole.

Storage instructions

Allow any leftover Mexican quinoa casserole to cool completely to room temperature before storing using one of the methods below:

  • Refrigerator Storage: Store leftovers in an airtight container in the fridge for up to 3 to 4 days.  
  • Freezing Instructions: Transfer cooled casserole leftovers to a freezer-safe airtight container and store in the freezer for up to 3 months. 
    • Storage Tip: Portion out the leftovers into individual servings and freeze for an easy grab-and-go microwave meals.
  • Reheating Instructions: Cover and reheat any leftover gently in a 350°F for 15-20 minutes, or until warm throughout. Alternatively, you can microwave individual portions at 50% power in 1-minute intervals, stirring between, until warm throughout.
Close-up photo showcasing the inside of a quinoa mexican casserole with shredded chicken, black beans, corn, and fluffy quinoa.

Boldly flavorful, deliciously satisfying, and super-simple to make, this Mexican quinoa casserole with chicken is the ultimate combination of comfort food and wholesome goodness. It’s the kind of recipe that transforms simple ingredients into something that feels truly special without any extra effort.

Whether you’re looking for a reliable weeknight family dinner or a fuss-free crowd-pleaser, this quinoa and chicken casserole is a meal you’ll actually look forward to making and eating again.

If you give it a try don’t forget to come back and let me know how it went over in the comments below. I truly love cheering you on in the kitchen!

Until next week, friends, cheers,

Cheyanne

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More Mexican casseroles with chicken

If you love this easy Mexican meal, try one of these delicious Southwestern recipes next!

Overhead photo of a quinoa casserole made with chicken and Mexican shredded cheese; topped with sliced avocados and diced tomatoes.

Quinoa Casserole with Chicken

5 from 8 votes
Author: Cheyanne Holzworth
Total Time: 50 minutes
Prep Time: 15 minutes
Cook Time: 35 minutes
Servings: 6 servings
Print Recipe Pin Recipe
Bold, smoky flavor meets effortless comfort in this chicken quinoa casserole. Picture: tender chicken, fluffy quinoa, plump black beans, sweet corn, and melty cheese layered together with just the right amount of Mexican spice and baked to bubbly perfection. It's everything you could want in a casserole—filling, nourishing, and wildly satisfying, without feeling heavy.

Equipment

  • 1 9×13” Baking Dish (or similar sized casserole dish)
  • 1 Saucepan (to cook quinoa)

Ingredients 

  • 1 ¼ Cups Uncooked Quinoa
  • 3 Cups Cooked Chicken – skin discarded if applicable; chicken shredded or chopped
  • 1 1/3 Cup Salsa Verde
  • ½ small Yellow Onion – finely diced
  • 1 (4.5 ounce) Can Chopped Green Chiles – drained
  • ¾ Cup Roasted Corn Kernels – canned or frozen (drained if using canned)
  • ¾ Cup Black Beans – drained and rinsed
  • 1 tsp EACH: Garlic Powder, Cumin, and Chili Powder
  • 1 ½ Cups Colby Jack, Monterey Jack OR Pepper Jack Cheese – freshly shredded, divided
  • 1 ¼ Cup Mozzarella Cheese – freshly shredded, divided
  • Optional Garnishes: Pico de Gallo Sliced Scallions, Chopped Cilantro, Sliced Avocados or Guacamole, Sour Cream

Instructions

  • Preheat Oven and Prep Casserole Dish: Arrange oven rack to the center position and then preheat the oven to 375 degrees F.
    Grease a 9×13’’ baking dish (or similar-size casserole dish) with non-stick cooking spray and then set aside.
  • Cook the Quinoa: Follow the package instructions and cook the quinoa according to directions.
    Once cooked, remove the quinoa from the heat, fluff and season generously with salt and pepper. Then, transfer the cooked quinoa to a large bowl.
    (Tip: See the notes section below for how to perfectly cook quinoa!)
  • Mix Casserole Ingredients: Add the cooked chicken, salsa, onion, green chiles, corn, black beans, garlic powder, cumin and chili powder to the bowl of quinoa. Stir to combine.
    Fold in 1 cup of jack cheese and ½ cup of mozzarella. Generously season with salt and pepper. (SEE NOTES)
    Grab a spoon and try the casserole, then adjust the flavors to suit your tastebuds.
  • Transfer Quinoa Mixture to Prepared Casserole Dish: Carefully dump the casserole mixture into the prepared baking dish. Use a spoon or spatula to smooth down the top.
  • Top with Cheese and Bake: Sprinkle the remaining cheeses evenly over the top of the casserole.
    Then, transfer the quinoa casserole to the preheated oven and bake for 20-22 minutes or until the cheese is melted and bubbly.
  • Serve Mexican Quinoa Casserole: Remove baking dish from the oven and let rest for 5 minutes.
    After cooling slightly, sprinkle your favorite Mexican garnishes, like pico, cilantro, and diced avocado over the top and dollop with sour cream, if using. Serve warm and enjoy immediately!

Video

Notes

  • If your quinoa and the chicken quinoa mixture seems on the dry side, add more salsa one tablespoon at a time.  If you cooked the quinoa according to the directions below, you shouldn’t need more salsa.
  • Baked quinoa casserole leftovers can be stored in an airtight container in the freezer for up to 3 months.  Pro-tip:  Portion out leftover quinoa casserole into individual servings and freeze for an easy microwave meal (perfect for lunches)!
  • Unbaked quinoa casserole can be assembled and covered tightly with plastic wrap and then foil and stored in the freezer for up to 3 months.  When ready to bake, thaw the casserole in the refrigerator overnight and bake per the recipe instructions, adding 15-20 minutes to the cook time.
  • How to Cook Perfect Quinoa: 
    • Rinse quinoa in a fine mesh strainer with cool water and drain well.
    • Transfer quinoa to a saucepan and add 2 1/2 cups of water.  Bring the mixture to a boil over medium-high heat.  Immediately reduce heat to maintain a gentle simmer.  Cook quinoa, stirring occasionally, until all of the water is absorbed, about 15 minutes, reducing heat as necessary.  
    • Remove pan from heat and cover.  Let the quinoa steam, covered, for 5 minutes.  Remove lid, fluff and season generously with salt and pepper.  Proceed with recipe.
  • Need to Scale the Recipe? Hover your mouse over the number of servings in the recipe card. You’ll see a sliding scale pop up, you can use that to scale the recipe up or down as needed.
  • Got questions? I’ve got answers! If you ever run into an issue, have a question, or need any clarification – please feel free to drop them in the comments section. I’m happy to help when I can! 
I am not a certified nutritionist. All the nutritional information is generated by an online calculator and provided as a courtesy. The nutrition facts are an estimate based upon 6 servings. Exact information will depend upon the brands of ingredients and precise measurements used.

Nutrition

Calories: 489kcal    Carbohydrates: 35g    Protein: 41g    Fat: 20g    Saturated Fat: 10g    Polyunsaturated Fat: 2g    Monounsaturated Fat: 6g    Cholesterol: 103mg    Sodium: 774mg    Potassium: 633mg    Fiber: 5g    Sugar: 5g    Vitamin A: 719IU    Vitamin C: 3mg    Calcium: 364mg    Iron: 3mg
Course: entree
Cuisine: American, Mexican

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