Name: Keto Chicken and Broccoli Casserole Recipe
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 2 cups cooked chicken, shredded or diced; 2 cups broccoli florets, steamed; 1 cup heavy cream; 1 cup shredded mozzarella cheese; 1/2 cup mayonnaise; 2 cloves garlic, minced; 1 teaspoon Italian seasoning; Salt and pepper to taste; 1/2 cup grated Parmesan cheese (for topping)

If you’re craving a comforting dish that’s low in carbs but big on flavor, this Keto Chicken and Broccoli Casserole Recipe is exactly what you need. I love making it when I want something cozy yet healthy — perfect for weeknight dinners or meal prep for busy days ahead.

A white rectangular baking dish holds a baked dish with two main visible layers: the bottom layer is a creamy mixture, and the top layer is a browned, melted cheese crust with small spots of darker golden brown, sprinkled with finely chopped green herbs spread evenly on top. The dish rests on a white and gray striped cloth that lies on a white marbled surface. In the background, there are blurred elements including a head of broccoli and garlic. The lighting is soft and natural, highlighting the bubbling texture of the cheese layer. photo taken with an iphone --ar 4:5 --v 7 — Keto Chicken and Broccoli Casserole, low-carb chicken casserole, keto healthy dinner, cheesy chicken and broccoli bake, keto meal prep casserole

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In the Kitchen
Ingredients at a Glance
How to Make Keto Chicken and Broccoli Casserole Recipe
Things to Remember
Ways to Serve It
Make-Ahead & Keeping Fresh
Frequently Asked Questions
Final Thoughts
Full Printable Recipe

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In the Kitchen

This casserole brings together tender chicken and vibrant broccoli with creamy, cheesy goodness. I find it’s a family favorite because it’s simple enough for a busy evening, but special enough to feel like a treat.

Juicy and Tender Every Time: Using cooked chicken keeps the texture just right without drying out.
Golden, Satisfying Finish: That Parmesan topping browns beautifully, adding a toasty crunch.
Simple Ingredients, Big Impact: Pantry staples like mayo and Italian seasoning bring surprisingly rich flavor.
Weeknight to Weekend Ready: Easily doubles for a crowd or stores well for leftovers.

Ingredients at a Glance

Keto Chicken and Broccoli Casserole Recipe - Recipe Image — Keto Chicken and Broccoli Casserole, low-carb chicken casserole, keto healthy dinner, cheesy chicken and broccoli bake, keto meal prep casserole

Choosing quality ingredients makes a huge difference. Fresh broccoli and good-quality cheese turn this casserole from simple to spectacular, so don’t rush those choices.

Cooked chicken: Use leftover roast chicken or poached breasts for tender, juicy bites.
Broccoli florets: Steam until just tender to keep that vibrant green color and satisfying crunch.
Heavy cream: Provides richness without overpowering the other flavors.
Shredded mozzarella cheese: Melts beautifully, creating that classic creamy texture you want in casseroles.
Mayonnaise: Adds creaminess and tang; opt for full-fat for the best keto-friendly texture.
Garlic and Italian seasoning: These aromatics bring warmth and depth.
Parmesan cheese: A sprinkle on top that crisps up into a golden crust.
Salt and pepper: Essential for bringing all the flavors together just right.

Heads-Up: Exact measurements are in the printable recipe card at the bottom.

How to Make Keto Chicken and Broccoli Casserole Recipe

Step 1 — Prepare and Mix Your Ingredients

Start by steaming your broccoli until it’s tender but still bright green — about 4 to 5 minutes. While it’s cooling, shred or dice your cooked chicken. In a large bowl, combine the chicken, broccoli, heavy cream, mozzarella, mayo, minced garlic, Italian seasoning, and a good pinch of salt and pepper. Mix just enough to coat everything evenly. You’ll notice the mixture becomes creamy and inviting right away.

Step 2 — Assemble the Casserole

Grease a 9×9-inch baking dish with a little butter or oil to prevent sticking. Pour your chicken and broccoli mixture into the dish and spread it out evenly, smoothing the top as you go. This even layer ensures consistent baking and a beautiful presentation every time.

Step 3 — Top and Bake to Golden Perfection

Sprinkle the grated Parmesan cheese generously over the top — this is key to achieving that irresistible golden crust. Pop the casserole into your preheated 350°F (175°C) oven and bake for about 25 to 30 minutes. You’ll know it’s done when it’s bubbly around the edges and the Parmesan has melted into a toasty, golden finish. Let it rest for a few minutes before serving to let everything set nicely.

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Things to Remember

Keep your casserole moist and flavorful by paying attention to doneness and temperature. I’ve learned a few tricks over the years that make all the difference.

Doneness Cue: Look for bubbling edges and a golden Parmesan crust as your signal to pull it from the oven.
Temperature Trick: Baking at 350°F ensures even cooking without drying out the chicken.
Make-Ahead Move: Assemble the casserole a day ahead and refrigerate; it bakes beautifully straight from the fridge with little adjustment.
Common Pitfall: Avoid over-steaming your broccoli to prevent mushiness; it should be tender yet crisp.

Ways to Serve It

Finishing Touches

I like to finish this Keto Chicken and Broccoli Casserole Recipe with a sprinkle of freshly chopped parsley or a dusting of crushed red pepper flakes for a little kick. Adding a squeeze of fresh lemon juice brightens the rich creaminess and balances the cheese.

Plays Well With

This casserole pairs wonderfully with a crisp green salad or a side of roasted asparagus to add different textures and freshness. A dollop of sour cream or a side of avocado slices also complements the richness nicely.

Simple Plating Upgrades

For a casual family dinner, I serve straight from the casserole dish with a rustic breadbasket nearby. For a special occasion, transfer portions to individual ramekins, garnish with herbs, and serve on warm plates to elevate the experience effortlessly.

Make-Ahead & Keeping Fresh

Storing Leftovers

Store your leftovers in an airtight container in the refrigerator for up to 3 days. You’ll find the texture stays creamy and the flavors deepen overnight, making for an even tastier next-day meal.

Freezing Tips

This Keto Chicken and Broccoli Casserole Recipe freezes surprisingly well. Freeze portions individually in freezer-safe containers, and thaw overnight in the fridge before reheating. Avoid freezing with fresh garnishes—add those after reheating for best texture.

Reheating Keto Chicken and Broccoli Casserole Recipe Without Drying Out

Reheat gently in the oven at 325°F until warmed through, covering loosely with foil to keep moisture in. For quicker reheating, microwave in short bursts with a damp paper towel over the top to maintain creaminess. The air-fryer can crisp the topping nicely if you reheat uncovered for the last few minutes.

Frequently Asked Questions

Can I use frozen broccoli for this casserole?

Yes, you can! Just be sure to thaw and drain it well to avoid excess moisture that can make the casserole watery.

Is it okay to use shredded rotisserie chicken?

Absolutely! Rotisserie chicken is a great shortcut that adds wonderful flavor while saving prep time.

Is this Keto Chicken and Broccoli Casserole Recipe suitable for meal prep?

Definitely. It keeps well in the fridge for a few days and can be portioned out for quick lunches or dinners.

Can I add other vegetables to this recipe?

Yes! Low-carb veggies like cauliflower or spinach work well; just adjust steaming times to keep textures balanced.

Final Thoughts

Making the Keto Chicken and Broccoli Casserole Recipe has become a go-to for me when I want something satisfying without fuss. It’s comforting, creamy, and forgiving if you tweak the ingredients a little — yet always delivers that cozy meal feeling. Once you’ve tried it a few times, you’ll have your own tweaks and flavor boosts, turning this casserole into your personal kitchen favorite.

Full Printable Recipe