Keto Chicken Broccoli Casserole

This cheesy chicken broccoli casserole is a stunningly easy and delicious keto dinner recipe. It comes together in 25 minutes and has less than 5g net carbs per serving!

I don’t think I’ve ever craved casseroles the way I am craving them this winter. We’ve been enjoying smoked sausage casserole, ham and cauliflower casserole, and keto zucchini lasagna all winter.

But this creamy, low-carb chicken broccoli casserole just shot to the top of the list for me. It’s the best kind of keto comfort food. Rich, hearty, and full of flavour and good fats.

And who doesn’t love a full keto meal that you bake in a single dish? The busier we get, the more important it is to cut down on excess dishes. If I can cook the full meal all in one pan, I am that much happier come dinner time.

This keto chicken broccoli casserole checks all the boxes. It’s hearty and satisfying, it has protein, veggies, and healthy fats, and it goes from stovetop to oven in a single large skillet.

Easy chicken casserole recipe

Chicken and broccoli is not an unusual combination in any way, but I found my inspiration for this skillet dinner standing in line at the grocery store check out. There it was, staring me in the face, on the front of Cast Iron Cooking or some such magazine.

Oh my it looked good. And the drizzly cold rain in Portland made it look even better…except for the fact that it was made with pasta.

Um, no thanks. Why can’t the chicken and broccoli be enough? Why water down the nutrition in the good stuff with all the unnecessary carbs?

Of course, now I simply had to make a keto broccoli chicken casserole, with more of the good stuff and less of the carby fillers!

Ingredients

This easy keto meal takes ingredients you can find at any grocery store. You will need:

• Cooked chicken
• Broccoli florets
• Butter
• Heavy whipping cream
• Mozzarella or cheddar cheese
• Parmesan
• Garlic
• Salt and pepper

How to make keto chicken broccoli casserole

1. Use an ovenproof skillet: This is a recipe that goes straight from stovetop to oven, so that you don’t have to transfer the mixture to a casserole dish. The skillet does not have to be cast iron, although it’s always a good choice. 
2. Use plenty of broccoli: Several conventional recipes I referenced had a scant cup of broccoli for the whole casserole. Why skimp on that? I put in a full 12 ounces, which is closer to 3 cups chopped. This makes the recipe a full one-pan meal. 
3. Cook the broccoli: Chop the florets coarsely so it cooks through a little faster and more evenly. You want to sauté it until it’s bright green and just bareIy tender, as it will cook more in the oven. I don’t recommend frozen broccoli here as it will become overcooked and mushy very quickly. 
4. Make the sauce: I made a basic keto alfredo sauce, with plenty of butter, cream, Parmesan cheese, and garlic. As long as you use heavy cream, you don’t need flour or cream cheese to thicken it. Just simmer a few minutes and keep your eye on it so that it doesn’t thicken too much.
5. Add the broccoli and chicken: Any pre-cooked chicken will work here. I like to quickly cook some chicken thighs by simmering them in chicken broth for 15 minutes. But you can use use rotisserie chicken too. 
6. Sprinkle with the cheese: I used mozzarella for that extra gooey factor, but you could try other cheeses such as cheddar or Gruyere.
7. Broil the casserole: This melts the cheese and makes it deliciously golden brown on top.

Frequently Asked Questions

Keto Chicken Broccoli Casserole

This cheesy chicken broccoli casserole is a stunningly easy and delicious keto dinner recipe. It comes together in 25 minutes and has less than 5g net carbs per serving!

4.97 from 79 votes

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Course: Main Course

Cuisine: American

Keyword: keto chicken broccoli casserole

Prep Time: 5 minutes

Cook Time: 16 minutes

Total Time: 21 minutes

Servings: 6 servings

Calories: 493kcal

Ingredients

• ¼ cup butter, divided
• 12 ounces broccoli , coarsely chopped
• 2 cloves garlic, minced
• 1 cup heavy whipping cream
• 1 ½ cups shredded mozzarella, divided
• ½ cup grated parmesan cheese
• Salt and pepper
• 3 cups cooked chopped chicken (about 1 ¼ lbs)

US Customary – Metric

Instructions

• Set a 10-inch ovenproof skillet over medium heat and add 2 tablespoons of the butter. Once melted, add the broccoli and sauté until bright green and just tender, about 4 minutes. Remove the broccoli to a bowl.
• Melt the remaining butter in the pan and add the garlic, cooking until fragrant, about 1 minute. Add the cream and bring to a simmer, then cook until reduced by about half, 3 to 5 minutes.
• Stir in ½ cup of the mozzarella and all of the Parmesan until melted. Season with salt and pepper to taste. Stir in the broccoli and the chicken and top with the remaining 1 cup of mozzarella cheese. 
• Preheat the broiler. Set the pan about 6 inches from the heat and broil until the cheese is beginning to brown, 2 to 5 minutes (depends on how intense your broiler is!).

Nutrition Facts

Keto Chicken Broccoli Casserole

Amount Per Serving (1 serving = ⅙th of recipe)

Calories 493 Calories from Fat 312

% Daily Value*

Fat 34.7g53%

Carbohydrates 6.1g2%

Fiber 1.5g6%

Protein 27.2g54%

* Percent Daily Values are based on a 2000 calorie diet.