Amazing keto chicken casserole: 5g net carbs

September 4, 2025
Written By Katherine Connolly

Katherine "Kate" Connolly is the founder of Kings Cook, a recipe developer, and a passionate home cook with a degree in nutrition science. Raised in a bustling Midwest kitchen, she believes everyone can cook with confidence. Kate specializes in creating delicious, reliable, and easy-to-follow American recipes designed for everyday life. Her mission is to help you master your kitchen and bring joy to your dinner table, one recipe at a time.

You know those days when you just crave something warm, cheesy, and utterly comforting, but you’re trying to stick to your goals? Yeah, I get it! That’s exactly why I fell head over heels for this keto chicken casserole. It hits all those soul-soothing notes – rich, cheesy goodness, tender chicken, and a creamy sauce – all while keeping those carbs way down. Seriously, it’s become my go-to for a reason! My kitchen’s always buzzing with the goal of making good food feel totally achievable and joyful, and this dish is pure proof of that mission.

Why You’ll Love This Keto Chicken Casserole

Seriously, this isn’t just another casserole. It’s a winner, and here’s why:

  • It’s the ultimate cheesy keto bake! Think creamy, dreamy sauce and tons of melty cheese.
  • Perfect for weeknight keto meals – it comes together so fast!
  • It’s a total crowd-pleaser, even for those who aren’t strictly keto. It’s just plain delicious comfort food for the whole family.
  • Super versatile, making it easy to adapt for different veggies or cheeses you might have on hand.

Gather Your Ingredients for Keto Chicken Broccoli Casserole

Okay, let’s chat about what you’ll need for this incredibly yummy keto chicken broccoli casserole. It’s pretty straightforward, using mostly everyday ingredients we all love. I always try to grab good quality chicken for the best flavor, and fresh broccoli makes a world of difference here. Don’t worry if you can’t find *exactly* these things, we’ll chat about swaps later!

Here’s your shopping list, so get your kitchen ready!

  • 1.5 pounds boneless, skinless chicken breasts, cut into bite-sized pieces (I swear by chicken breasts here for a cleaner flavor, but thighs work too!)
  • 1 tablespoon olive oil (just a splash for sautéing!)
  • 1 cup broccoli florets, chopped small (Make sure they’re bite-sized so they cook nicely in the casserole)
  • 1/2 cup chopped onion (A little sweetness from the onion is key!)
  • 2 cloves garlic, minced (Or more if you’re a garlic lover like me!)
  • 4 ounces cream cheese, softened (Super important it’s softened so it melts smoothly!)
  • 1/2 cup heavy cream (This makes our sauce oh-so-creamy!)
  • 1 cup shredded cheddar cheese (Sharp cheddar is my favorite!)
  • 1/2 cup shredded Monterey Jack cheese (For extra melty goodness)
  • 1/4 teaspoon salt (To make all those flavors pop!)
  • 1/4 teaspoon black pepper
  • 1/4 teaspoon garlic powder (An extra little punch of garlic flavor!)

Simple Steps to Make Keto Chicken Casserole

Alright, let’s get this amazing keto chicken casserole into the oven! It really is as simple as 1-2-3, but I’ll break it down so you can’t go wrong. My goal is always to make cooking feel like a breeze, not a chore, and this recipe totally delivers on that. Trust me, the smell alone when this comes out is heavenly! If you like creamy chicken dishes, you should also totally check out my easy chicken alfredo bake or my creamy Tuscan chicken too!

Preheating and Preparing the Pan

First things first, get that oven preheating to 375°F (190°C). While it’s warming up, grab your trusty 9×13 inch baking dish. You’ll want to give it a good greasing – a little olive oil or butter works wonders to make sure nothing sticks after all your hard work. Nobody wants to lose a delicious piece of casserole to a stubborn pan!

Cooking the Chicken and Veggies for Keto Chicken Broccoli Casserole

Heat up about a tablespoon of olive oil in a big skillet over medium-high heat. Toss in your bite-sized chicken pieces and let them brown up nicely on all sides. Once they’re cooked through, scoop them out and set them aside. Now, into that same skillet, throw in your chopped onion. Let it soften up for about 5 minutes until it’s looking a little translucent. Then, add your minced garlic – just about a minute, until it smells amazing! Now, toss in those broccoli florets. You want them tender-crisp, so about 3-5 minutes stirring them around is perfect. We don’t want mushy broccoli in our yummy keto chicken broccoli casserole!

Creating the Creamy Cheese Sauce

Turn the heat down to low here – we don’t want anything to scorch. Add your softened cream cheese and that lovely heavy cream right into the skillet with the veggies. Stir it all together until it’s super smooth and creamy. Seriously, this part is so satisfying to watch! Then, stir in your shredded cheddar and Monterey Jack cheeses, along with the salt, pepper, and garlic powder. Keep stirring until all that cheese is melted and you have a glorious, velvety sauce.

Combining and Baking the Keto Chicken Casserole

Now for the best part! Return that cooked chicken to the skillet. Stir everything around to make sure every piece of chicken and broccoli is coated in that luscious cheese sauce. Pour this whole wonderful mixture into your prepared baking dish. Slide it into the preheated oven and let it bake for about 20 to 25 minutes. You’re looking for it to be bubbly and heated all the way through. It’s like magic!

Resting and Serving

Once it’s bubbly and golden, pull that glorious keto chicken casserole out of the oven. Let it sit for just a few minutes before you dig in. This little rest helps everything settle and means that creamy sauce won’t just run everywhere when you serve it. It makes for a much better eating experience, trust me!

Tips for the Best Keto Chicken Casserole

Making a truly great keto chicken casserole is all about a few little tricks up your sleeve! It’s so disappointing when a casserole turns out watery, right? I’ve learned a few things over the years to make sure my keto creations are perfectly creamy and delicious, never watery. And don’t even get me started on how much I love finding smart ways to thicken things up without any hidden carbs! If you like roasted veggies, you should totally try my garlic parmesan roasted carrots too!

Preventing a Watery Keto Casserole

Okay, first things first to avoid that dreaded watery situation: make sure your veggies aren’t releasing too much liquid. I like to lightly steam my broccoli or cauliflower before adding it to the sauce. If you’re using something like spinach, just give it a quick wilt and squeeze out any excess water. Also, ensuring your cream cheese is fully softened and the sauce is nice and thick *before* you add the chicken will really help. It’s all about that sauce consistency!

Choosing the Best Veggies for Keto Casserole

Broccoli is fantastic here, but don’t be afraid to mix it up! Cauliflower is another amazing low-carb star that works beautifully in casseroles. For a different texture and flavor, finely chopped zucchini (make sure to pat it dry!) or some wilted spinach are also brilliant choices. These veggies hold up well to baking and don’t add a ton of net carbs, keeping your casserole firmly in keto territory. They just soak up that cheesy sauce so perfectly!

Ingredient Notes and Substitutions

Let’s talk about some of the star players in this keto chicken casserole and how you can totally customize it! Sometimes you just don’t have exactly what the recipe calls for, and that’s okay! I’ve played around with this recipe a bunch, and I’ve got some ideas for you. Feel free to get creative!

Chicken thighs are a fantastic substitute for chicken breasts; in fact, they can make the casserole even more moist and flavorful because they have a bit more fat. If you do go with thighs, just make sure they’re boneless and skinless, and cut into similar bite-sized pieces. When it comes to cheese, hey, I love cheddar and Monterey Jack together, but feel free to use what you have! Colby Jack is great, or even a good sharp provolone can give it a nice little twist. Just aim for about 1.5 cups of shredded cheese total. And of course, you can always swap out the broccoli for cauliflower or even some chopped zucchini if that’s what you’ve got in your fridge!

Meal Prep and Storage for Keto Chicken Broccoli Casserole

This keto chicken casserole is an absolute dream for meal prep! Seriously, making a big batch means delicious, macro-friendly meals are ready to go when life gets hectic. I love portioning this out into individual containers – makes grabbing breakfast or lunch on the go so easy. It’s also freezer-friendly, which is a major win in my book! You can just cool it completely, portion it into airtight containers, and stash them away for those times you *really* don’t want to cook. If you’re a fan of prepping ahead, you should totally check out my slow cooker chicken tortilla soup for another easy option!

When you’re ready to reheat, you can pop a portion in the microwave for a couple of minutes, or even better, warm it up in a toaster oven or a regular oven at around 350°F (175°C) until it’s nice and bubbly again. It tastes almost as good as when it’s fresh out of the oven the first time!

Frequently Asked Questions about Keto Chicken Casserole

I get asked a lot of questions about this keto chicken casserole, and I love hearing from you all! It’s such a reliable go-to, so it makes sense that you want to know all the ins and outs. Let’s dive into some of the most common questions I get:

Can I make this keto chicken casserole ahead of time?

Oh, absolutely! This is one of my favorite dishes for meal prep. You can totally assemble the entire casserole, cover it tightly, and keep it in the fridge for up to 2 days before baking. Just add a few extra minutes to the baking time since it’ll be going into the oven cold. It’s also freezer-friendly, which is amazing for those weeks when you need a quick dinner! If you’re thinking about week-ahead meals, my easy chicken noodle soup is another fantastic option for that!

What can I serve with this keto chicken casserole?

That’s a great question! Because this casserole is so satisfying and filling on its own, you don’t need a lot to go with it. A simple side salad with a vinaigrette is fantastic. Or, if you’re feeling like something a bit more substantial, some roasted green beans or a quick sauteed zucchini are perfect keto-friendly options. For those who want a hearty bread experience next to their comforting bake, my cheesy garlic breadsticks are surprisingly low in carbs and are always a hit!

Is this keto chicken casserole gluten-free?

Yes, it sure is! This recipe naturally uses ingredients that are gluten-free, so you don’t need to worry about any sneaky gluten hiding in here. It’s a fantastic option for anyone looking for a delicious gluten-free meal that tastes like pure comfort food. If you’re new to gluten-free eating, this casserole is a super easy way to start!

How can I make this casserole lower in carbs or different veggies?

Great question! Broccoli is pretty low-carb, but if you want to swap it out, cauliflower is an excellent choice. Just chop it up small, and it’ll bake up beautifully. Spinach is another option; just wilt it down first and squeeze out any excess moisture so your casserole isn’t watery. Asparagus also works really well! For an even lighter touch, you could add some diced bell peppers, but just be mindful that they can have slightly more carbs than broccoli or cauliflower.

Can I use leftover cooked chicken for this recipe?

Definitely! If you have some leftover roasted chicken or rotisserie chicken, this is the perfect way to use it up. Just make sure it’s cut into bite-sized pieces and measure out about 3-4 cups. You’ll skip the chicken-cooking step in the recipe and just add the pre-cooked chicken to the creamy sauce with the veggies before transferring it to the baking dish. Easy peasy!

Nutritional Information for Keto Chicken Casserole

Now, let’s talk numbers for our glorious keto chicken casserole! This is just an estimate, of course, because every kitchen and every ingredient can be a little bit different. But generally, a serving of this cheesy, deliciousness clocks in around **450 calories** with about **30g of fat**, a fantastic **38g of protein**, and the best part – only **5g of net carbs** (that’s total carbs minus fiber!). So you can feel really good about digging into a comforting bowl that fits perfectly into your keto lifestyle. Enjoy every bite!

Share Your Keto Chicken Casserole Creations!

I truly hope you adore this keto chicken casserole as much as I do! If you try it out, please do me a favor and pop back here to leave a comment and a star rating. I absolutely love hearing about your kitchens and seeing how you made it your own! Did you add different veggies or cheeses? Let me know! You can also check out my about page to learn more about my cooking philosophy.

Print

Keto Chicken Broccoli Casserole

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

No reviews

A simple, cheesy, and low-carb chicken casserole with broccoli, perfect for weeknight dinners and meal prep.

  • Author: kate
  • Prep Time: 15 min
  • Cook Time: 30 min
  • Total Time: 45 min
  • Yield: 6 servings 1x
  • Category: Dinner
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Ingredients

Scale
  • 1.5 lbs boneless, skinless chicken breasts, cut into bite-sized pieces
  • 1 tbsp olive oil
  • 1 cup broccoli florets, chopped
  • 1/2 cup chopped onion
  • 2 cloves garlic, minced
  • 4 oz cream cheese, softened
  • 1/2 cup heavy cream
  • 1 cup shredded cheddar cheese
  • 1/2 cup shredded Monterey Jack cheese
  • 1/4 tsp salt
  • 1/4 tsp black pepper
  • 1/4 tsp garlic powder

Instructions

  1. Preheat your oven to 375°F (190°C).
  2. Heat olive oil in a large skillet over medium-high heat. Add chicken pieces and cook until browned on all sides. Remove chicken from skillet and set aside.
  3. In the same skillet, add chopped onion and cook until softened, about 5 minutes. Add minced garlic and cook for 1 minute more until fragrant.
  4. Add broccoli florets to the skillet and cook for 3-5 minutes until slightly tender.
  5. Reduce heat to low. Stir in cream cheese and heavy cream until smooth and combined.
  6. Add shredded cheddar and Monterey Jack cheeses, salt, pepper, and garlic powder. Stir until cheese is melted and sauce is creamy.
  7. Return the cooked chicken to the skillet. Stir to coat the chicken and broccoli evenly with the cheese sauce.
  8. Pour the mixture into a greased 9×13 inch baking dish.
  9. Bake for 20-25 minutes, or until the casserole is bubbly and heated through.
  10. Let it rest for a few minutes before serving.

Notes

  • For a thicker casserole, you can add a tablespoon of psyllium husk powder to the cheese sauce.
  • This casserole is freezer-friendly. Let it cool completely, then portion into airtight containers. Reheat in the oven or microwave.
  • You can substitute cauliflower florets for broccoli if preferred.
  • Ensure your cream cheese is fully softened to prevent lumps in the sauce.

Nutrition

  • Serving Size: 1 serving
  • Calories: 450
  • Sugar: 3g
  • Sodium: 400mg
  • Fat: 30g
  • Saturated Fat: 18g
  • Unsaturated Fat: 12g
  • Trans Fat: 0g
  • Carbohydrates: 7g
  • Fiber: 2g
  • Protein: 38g
  • Cholesterol: 150mg

Did you make this recipe?

Share a photo and tag us — we can't wait to see what you've made!

Leave a Comment

Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star