This Keto Chicken Broccoli Casserole is the kind of comfort food I never get tired of. Tender broccoli and juicy chicken are topped with a creamy sauce and cheese to create a dish both children and adults are crazy about. You can make this keto casserole in your oven, Instant Pot, or Crockpot.

Overhead photo of a keto chicken broccoli casserole in a white casserole dish.

I don't know about you, but I need more recipes like this Low Carb Chicken Broccoli Casserole in my life.

It takes less than fifteen minutes of hands-on prep time and needs only twenty minutes in the oven. (You can also make it in your Instant Pot, or plan ahead and make it in your slow cooker.)

As easy as this recipe is to make, it is also crazy-delicious. We like to serve it with a side of keto mashed cauliflower and enjoy some no-bake cookies for dessert!

Ingredient Notes

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Almond Flour - Use almond flour, not almond meal. I prefer finely ground almond flour, such as Bob's Red Mill or Besti.
Heavy Cream - If you are low carb and not keto, you can use half and half. However, if you make this in the Instant Pot, stick with the heavy cream since low-fat dairy does not do well in the Instant Pot.
Sour Cream - Use full-fat!
Mayonnaise - Did you know that some brands have sugar? Make sure you read the label!.
Smoked Paprika -If you don't have it, you can leave it off or use regular paprika.
Broccoli Florets - Use fresh if you can. Frozen works in a pinch.

Tips & Tricks

This keto chicken and broccoli casserole isn't particularly fussy, so feel free to play with it a bit. Cauliflower would work in place of broccoli, and almost any cheese will do. I have made this with cheddar cheese, and it is great.
You can steam the broccoli instead of blanching it, just make sure you don't overdo it to the point that the broccoli gets mushy when baked.
To minimize waste, don't discard the broccoli stems. Use a vegetable peeler to remove the tough skins and then slice them. Blanch or steam them along with the rest of the florets.
For the chicken, you can save time by picking up a rotisserie chicken at the grocery store. Other great options include making Instant Pot Shredded Chicken or Slow Cooker Shredded Chicken.

Mix it Up

To add an extra punch, saute' ½ cup diced onion and 2 cloves of minced garlic in the butter before adding the liquids.
Substitute cooked and crumbled Italian sausage for the chicken.
Bacon is always a good addition to keto chicken recipes, and this one is no exception. I recommend eight ounces of cooked and crumbled bacon.
Any shredded cheese works here - cheddar, smoked gouda, and mozzarella are all good options.
If you would like to make Keto Chicken Broccoli Rice, just add in 3 cups of riced cauliflower that has been sautéed.

Step by Step

Make The Sauce - Oven and Crockpot

Melt the butter and add the almond flour in a saucepan. Whisk together and cook for 1 minute.

Photo of melted butter and almond flour in a sauce pan.

Photo of cream, broth, butter, and almond flour in a sauce pan and cream cheese that has just been added.

Add cream and broth and bring to a simmer. Stir in cheese and cook until melted.

Remove from heat and add seasonings, sour cream, and mayonnaise. Whisk until smooth.

Oven Instructions

To make broccoli chicken casserole keto, place the cooked chicken and broccoli in a baking dish.

Photo of a creamy sauce that has been poured over chicken and broccoli in a casserole dish.

Photo of an uncooked chicken broccoli casserole with shredded cheese on top.

Pour the creamy sauce over the chicken and broccoli in the casserole dish.

Sprinkle with cheese and bake for 20 minutes, until bubbly.

Slow Cooker Broccoli Cheese Casserole

This recipe can be prepared in your Crockpot.

Just transfer the vegetables and chicken to your slow cooker and top with the sauce and cheese. Cook on low for 4 hours.

Instant Pot Keto Broccoli Cheese Casserole

The Instant Pot Instructions are slightly different, so make sure to follow them and not the slow cooker or oven instructions.

Also, you cannot substitute milk or half and half for the heavy cream. The fat in the cream is what keeps it from curdling. If you want to make this lower in fat, I would recommend using broth.

To make broccoli cheddar chicken casserole keto in your Instant Pot, start by setting it to saute. Melt the butter, and then when it is melted add the almond flour.

Cook for a minute, whisking constantly. Stir in the cream and broth. Bring to a simmer and then add the seasonings. Add the cooked chicken and broccoli to the pot, and toss.

Cook at high pressure for 1 minute and then do a quick release. Stir in the cream cheese, sour cream and mayonnaise.

Place the lid on the Instant pot and let stand until the cream cheese melts. Stir to combine. Add the shredded cheese and replace the lid until the cheese is melted.

Photo of a keto chicken broccoli casserole with a spoon taking a serving out of the white casserole dish.

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Overhead photo of Keto Chicken Broccoli Casserole in a white casserole dish with a wooden spoon on one side and plates on the other side.

Print Recipe

5 from 6 votes

Keto Chicken Broccoli Casserole

This Keto Chicken Broccoli Casserole is the kind of comfort food I never get tired of. Tender broccoli and juicy chicken are topped off a creamy sauce and cheese to create a dish both children and adults are crazy about. This recipe isn't particularly fussy, so feel free to play with it a bit. Cauliflower would work in place of broccoli, and most any cheese will do. You can steam the broccoli instead of blanching it, just make sure you don't over do it to the point that the broccoli gets mushy when baked.

Prep Time5

Cook Time28

Total Time33

Course: Main

Cuisine: American

Keyword: cheesy, creamy

Servings:

Calories: 356kcal

Author: Wendy Polisi

As an Amazon Associate I earn from qualified sales.

Ingredients

1 tablespoon butter
1 tablespoon almond flour
½ cup heavy cream
½ cup chicken broth
4 ounces cream cheese cubed
½ cup sour cream
¼ cup mayonnaise
1 teaspoon garlic powder
½ teaspoon smoked paprika
¼ teaspoon cayenne pepper
Salt and Pepper to taste
12 ounces broccoli florets blanched
1 pound chicken cooked and shredded
6 ounces gruyere cheese

US Customary - Metric

Instructions

Melt butter in a medium sauce pan. Add almond flour and cook for 1 minute, whisking constantly.
Stir in cream and broth, and bring to a simmer. Add cream cheese and cook until melted.
Remove from heat, and stir in sour cream, mayonnaise, garlic powder, smoked paprika, and cayenne pepper. Season to taste with salt and pepper.

Oven Instructions

Preheat oven to 350 degrees.
Place broccoli and chicken in a large baking pan and pour the sauce over.
Top with cheese.
Bake for 20 minutes, until bubbly and cooked through.

Slow Cooker Instructions

Place the chicken and broccoli in your slow cooker and pour the sauce over it.
Top with cheese and cook on low for about 4 hours.

Instant Pot Instructions

Set your Instant Pot to saute. Melt butter and add almond flour. Cook for 1 minutes, whisking constantly. Stir in cream and broth and bring to a simmer. Add garlic powder, smoked paprika and cayenne pepper. Season to taste with salt and pepper.
Add cooked chicken and broccoli to the pot and toss.
Set to high pressure for 1 minutes. Do a quick release. Stir in cream cheese, sour cream, and mayonnaise. Place lid on the instant pot and let sit until the cream cheese melts. Stir to combine. Add the shredded cheese and replace lid until the cheese melts.

Notes

Storage

Keep leftovers of keto chicken broccoli cheese casserole in the refrigerator for up to three days.

You can freeze this recipe after cooking it, but expect a slight deterioration in texture.

I recommend reheating over medium-low heat on the stove, stirring to incorporate mayonnaise and sour cream that has separated.

Make Ahead

You can prep this recipe up to a day ahead of time and bake it when you are ready to serve.

Alternatively, you can cook it ahead of time and reheat when serving. I recommend the first option if possible, but leftovers are good for a couple of days for lunches.

Nutrition

Keto Chicken Broccoli Casserole - Bake, Instant Pot or Slow Cook

Ingredient Notes

Tips & Tricks

Mix it Up