High-Protein Buffalo Chicken Quinoa Casserole (Freezer-Friendly!)

This buffalo chicken casserole is the perfect cozy weeknight dinner or football Sunday meal. What I love about this Casserole is that it’s bold, filling, secretly veggie-packed, and still freezer-friendly.

It gives you all the flavor of buffalo wings in a nourishing, high-protein casserole. I like to keep the heat manageable with a mild buffalo sauce, then mellow it out even more with a swirl of cream cheese or ranch at the end. You get that creamy, spicy, tangy bite, without needing a glass of milk.

If you like this dish, you should try my Keto Chicken Enchilada Casserole, Unstuffed Peppers Skillet(with Quinoa!) or Greek Quinoa Bowl (Easy Meal Prep!)

Why You Will Love This Dinner

Minimal cleanup – Everything bakes together in one dish!

High in protein – Chicken & quinoa are great protein sources

Veggie-loaded – Cauliflower rice, celery, and carrots are all tucked in.

Great for meal prep – Makes a big batch and freezes beautifully.

Ingredients

• Quinoa – A fiber and protein grain that absorbs flavor and adds complete plant-based protein.
• Buffalo sauce – Tangy, spicy, and customizable to your heat level.
• Chicken broth – Keeps it moist and flavorful (bone broth adds extra nutrients).
• Diced celery & chopped carrots – Classic buffalo flavors and colorful veggie power.
• Cauliflower rice – A sneaky veggie boost that blends right in.
• Chicken breast (cubed) – Use raw chunks or save time with pre-cooked shredded chicken.
• Optional cream cheese or ranch – Stir in at the end for creamy, cooling contrast.

Substitutions and Variations

• Use cooked shredded chicken to save time
• Swap quinoa for brown rice, cauliflower rice, or even orzo
• Add spinach or kale for even more greens
• Use dairy-free ranch or cream cheese if needed
• Kick up the heat with hot buffalo sauce or add chili flakes

Step-by-Step Instructions

Step 1:
Preheat oven to 375°F and lightly grease a 9x13-inch baking dish.

Step 2:
Add quinoa, chicken broth, buffalo sauce, carrots, celery, cauliflower rice, and chicken to the dish. Stir to combine evenly.

Step 3:
Cover tightly with foil and bake for 45 minutes, or until chicken is fully cooked through.

Step 4:
Remove from oven and take off foil, then cook uncovered until quinoa has absorbed liquid.

Step 5:
Top with chopped green onion or a drizzle of ranch and serve hot.

Tips and Notes

• Rinse your quinoa to remove bitterness before cooking
• Don’t skip the foil—it helps trap steam to cook the quinoa
• Add cheese on top before baking if you like a cheesy crust
• Let it rest for 5–10 minutes before serving for best texture

Recipe FAQs

Can I freeze this casserole?
Yes! Let it cool completely, then portion into freezer-safe containers. Freeze for up to 3 months.

Do I need to pre-cook the chicken?
Nope! You can add it raw (just make sure it’s in small chunks) or use pre-cooked shredded chicken.

Serving Suggestions

• Top with crumbled blue cheese or a drizzle of ranch
• Serve with a side salad or roasted broccoli
• Scoop into lettuce cups or tortillas for a fun twist
• Pair with celery sticks for that true buffalo wing vibe

Storage and Reheating Instructions

Storage:
Store in the fridge in an airtight container for up to 4 days.

Freezing:
Let cool fully, then store in individual portions or full dish in the freezer for up to 3 months.

Reheating:
Reheat in the microwave or oven until warmed through. Add a splash of broth if needed to loosen it up.

Make Ahead and Storage Tips:

To Prep Ahead: Chop all vegetables and add chicken, vegeteables, and quinoa to dish. Add broth and sauce right before cooking

Leftovers: Store this casserole in an air tight container in the fridge. This lasts about 5 days and makes great leftovers.

To Reheat: Rewarm in a baking dish in the oven at 350 degrees F or reheat in the microwave in a bowl.

To freeze: Freeze leftover buffalo chicken casserole in a freezer safe container for up to 3 months. Allow to thaw overnight in the refrigerator before serving.

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