Name: Keto Chicken Broccoli Casserole
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: American
Ingredients: 4 cups cooked chicken breast, shredded or chopped; 4 cups fresh broccoli florets; 1 1/2 cups shredded cheddar cheese; 4 oz cream cheese, softened; 1/2 cup sour cream; 1/4 cup mayonnaise; 1 teaspoon garlic powder; 1/2 teaspoon onion powder; 1/2 teaspoon salt; 1/4 teaspoon black pepper; 1/4 teaspoon crushed red pepper flakes (optional)

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Creamy, cheesy, and packed with protein, this keto chicken broccoli casserole brings together tender chicken, fresh broccoli, and a rich, savory sauce. It’s the kind of comforting, oven-baked dish I reach for when I want something easy, satisfying, and perfect for my low-carb goals.

Keto Chicken Broccoli Casserole

Ingredients

(Tip: You'll find the full list of ingredients and measurements in the recipe card below.)

4 cups cooked chicken breast, shredded or chopped

4 cups fresh broccoli florets

1 ½ cups shredded cheddar cheese

4 oz cream cheese, softened

½ cup sour cream

¼ cup mayonnaise

1 teaspoon garlic powder

½ teaspoon onion powder

½ teaspoon salt

¼ teaspoon black pepper

¼ teaspoon crushed red pepper flakes (optional)

Directions

I start by preheating the oven to 375°F (190°C) and lightly greasing a 9x13-inch baking dish.

Then I steam or blanch the broccoli florets for about 3–4 minutes, just until they’re slightly tender but still have a bit of bite. I drain and set them aside.

In a large mixing bowl, I combine the softened cream cheese, sour cream, mayonnaise, garlic powder, onion powder, salt, black pepper, and crushed red pepper flakes until smooth.

Next, I stir in the shredded chicken, steamed broccoli, and 1 cup of shredded cheddar cheese until everything is evenly mixed.

I transfer the mixture to the prepared baking dish and spread it out evenly.

I sprinkle the remaining ½ cup of cheddar cheese on top.

Then I bake it uncovered for 20–25 minutes, or until the casserole is fully heated and the top is golden and bubbly.

After baking, I let it sit for 5 minutes before serving.

Servings and timing

Prep Time: 15 minutes

Cook Time: 25 minutes

Total Time: 40 minutes

Servings: 6

Calories per serving: 385 kcal

Variations

I like to switch things up based on what I have on hand or what I’m in the mood for:

Add bacon: Crumbled cooked bacon adds a smoky crunch.

Spice it up: I sometimes add chopped jalapeños or a pinch of cayenne for extra heat.

Different cheese: Instead of cheddar, I swap in Monterey Jack, mozzarella, or even pepper jack for a new flavor twist.

Cauliflower instead of broccoli: When I want a change, cauliflower works just as well and keeps it keto.

Storage/Reheating

This casserole stores beautifully:

Refrigerator: I keep leftovers in an airtight container for up to 4 days.

Freezer: It freezes well too—just make sure it’s tightly wrapped or stored in a freezer-safe dish. It lasts up to 2 months.

Reheating: I reheat individual portions in the microwave for 1–2 minutes, or in the oven at 350°F until warmed through.

FAQs

What kind of chicken works best for this casserole?

I usually use rotisserie chicken or leftover grilled chicken breasts. Any cooked, shredded or chopped chicken works well.

Can I use frozen broccoli?

Yes, I can use frozen broccoli. I just make sure to steam it and drain it well so the casserole doesn't get watery.

Is this casserole spicy?

Not really. The red pepper flakes add a mild kick, but I leave them out when I want a milder version.

Can I make this ahead of time?

Absolutely. I often assemble it a day ahead, cover it, and store it in the fridge until I’m ready to bake it.

How do I know when it’s done baking?

Once the cheese on top is melted and bubbly and the center is hot throughout, it’s ready to come out of the oven—usually around the 25-minute mark.

Conclusion

This keto chicken broccoli casserole is one of my go-to low-carb dinners. It’s comforting, packed with flavor, and so easy to make ahead. Whether I’m prepping meals or feeding a crowd, this dish checks all the boxes—creamy, cheesy, and totally satisfying.

📖 Recipe:

Keto Chicken Broccoli Casserole

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Author: Cheryl
Total Time: 40 minutes
Yield: 6 servings

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Description

A creamy, cheesy, and protein-packed keto chicken broccoli casserole made with tender chicken, fresh broccoli, and a savory sauce. Perfect for low-carb diets, easy dinners, and meal prep.

Instructions

Preheat the oven to 375°F (190°C) and lightly grease a 9x13-inch baking dish.
Steam or blanch the broccoli florets for 3–4 minutes until slightly tender but still firm. Drain and set aside.
In a large bowl, mix cream cheese, sour cream, mayonnaise, garlic powder, onion powder, salt, black pepper, and red pepper flakes until smooth.
Add shredded chicken, steamed broccoli, and 1 cup of cheddar cheese to the mixture. Stir until evenly combined.
Transfer the mixture to the prepared baking dish and spread it out evenly.
Sprinkle the remaining ½ cup of cheddar cheese on top.
Bake uncovered for 20–25 minutes, until the top is golden and bubbly.
Let the casserole rest for 5 minutes before serving.