This keto broccoli chicken cheese casserole brings together tender shredded chicken, bright green broccoli, and a creamy cheese sauce made with cream cheese and cheddar. It is warm, filling, and low in carbs, so it fits a keto plan without tasting like diet food.

It is also simple. You mix everything in one bowl, spread it in a baking dish, top it with cheese, and bake for about 25 to 30 minutes. With leftover or rotisserie chicken, dinner for 4 is on the table in under an hour.

Why This Keto Casserole Works

Most chicken and broccoli casseroles use canned soup, rice, or flour to make the sauce thick. This one uses softened cream cheese thinned with a little chicken broth instead. That gives you a rich, creamy sauce with almost no carbs.

Steaming the broccoli first is the other key. It only bakes for half an hour, so a quick steam makes sure it ends up tender instead of raw and crunchy. Garlic powder, onion powder, and Italian seasoning add a lot of flavor without extra work.

Ingredients and Easy Swaps

• Cooked shredded chicken (2 cups): Rotisserie chicken is the fastest option. Leftover grilled or baked chicken also works. Cooked turkey is a good swap.
• Broccoli florets (2 cups): Fresh or frozen both work. If using frozen, thaw and pat dry so the casserole does not get watery.
• Cheddar cheese (1 cup): Sharp cheddar has the most flavor. Colby jack or mozzarella are milder choices. Save a handful for the top.
• Cream cheese (1 cup): Let it soften on the counter so it mixes in smoothly. Full-fat works best for keto.
• Chicken broth (1/2 cup): Low-sodium broth lets you control the salt.
• Seasonings: Garlic powder, onion powder, Italian seasoning, salt, and pepper. A pinch of red pepper flakes adds a little heat.

How to Make It at a Glance

1. Heat the oven to 350°F and grease a medium baking dish.
2. Steam the broccoli until just tender-crisp.
3. In a large bowl, stir together the chicken, broccoli, cream cheese, broth, most of the cheddar, and the seasonings.
4. Spread the mixture in the dish and sprinkle the rest of the cheddar on top.
5. Bake 25 to 30 minutes, until bubbly and golden. Cool a few minutes and top with parsley.

Common Mistakes to Avoid

• Cold cream cheese. It will leave lumps. Soften it for 30 minutes, or microwave it for 15 to 20 seconds.
• Wet broccoli. Drain it well after steaming. Extra water thins the sauce.
• Over-steaming. The broccoli keeps cooking in the oven. Pull it while it is still bright green.
• Too much salt early. Cheese and broth are salty. Taste the mixture before adding more.

Variations

• Bacon: Stir in a handful of crispy bacon bits before baking.
• Buffalo style: Add 2 to 3 tablespoons of hot sauce to the mixture.
• More veggies: Add sautéed mushrooms, spinach, or cauliflower florets.
• Crunchy top: Sprinkle crushed pork rinds and parmesan over the cheddar for a crisp, keto-friendly crust.

What to Serve With It

This casserole is a full meal on its own, but a simple side rounds it out. A green salad with ranch or vinaigrette is a fresh contrast. Cauliflower rice soaks up the sauce well. Roasted zucchini, sautéed green beans, or garlic butter mushrooms all keep the meal low carb. If some people at the table are not eating keto, serve their portion with rice or pasta.

Make Ahead, Storage, and Reheating

Make ahead: Assemble the casserole, cover it, and refrigerate up to 24 hours. Add 5 to 10 minutes to the bake time.

Storage: Keep leftovers in a covered container in the fridge for 3 to 4 days. It also makes an easy packed lunch.

Reheating: Microwave single portions for 1 to 2 minutes, stirring halfway. Or cover the dish with foil and warm at 350°F for 15 to 20 minutes until it reaches 165°F.

Freezing: Freeze portions for up to 2 months. Thaw overnight in the fridge. The sauce may look a little grainy after thawing, so stir well while reheating.

Keto Broccoli Chicken Casserole FAQ

Is this casserole really keto?
Yes. Chicken, cheese, and cream cheese are very low in carbs, and broccoli is one of the lowest-carb vegetables. There is no flour, rice, or canned soup.

Can I use raw chicken?
This recipe is built for cooked chicken. Raw chicken would need a much longer bake and would release liquid. Cook it first, then shred.

Can I use frozen broccoli?
Yes. Thaw it, drain it, and pat it dry. You can skip the steaming step.

What size dish should I use?
An 8×8 or 2-quart dish works well for this amount. A 9×13 will make a thinner layer that bakes a few minutes faster.

Tips for the Best Results

• Cut florets small. Bite-size pieces mix in evenly and make the casserole easier to scoop.
• Whisk the broth into the cream cheese first. Stirring them together before adding the chicken and broccoli gives you a smoother sauce with no lumps.
• Broil to finish. For a browned, crispy cheese top, broil for 1 to 2 minutes at the end. Stay close so it does not burn.

Kid-Friendly Swaps

This casserole already tastes a lot like broccoli and cheese, which many kids like. To make it even more kid-friendly, use mild cheddar and skip the red pepper flakes. Chop the broccoli extra fine so it blends into the sauce. A sprinkle of crushed pork rinds or buttery crackers on top adds a fun crunch.