Can I make this ahead of time?

Yes, you can assemble it early and keep it in the fridge until dinner, then just bake it when you are ready.

Will my kids really eat this?

Most kids love the cheesy sauce, which makes the broccoli taste wonderful, making it a very kid-approved meal.

Keto Chicken Broccoli Casserole

Name: Keto Chicken Broccoli Casserole
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: American
Ingredients: 1.5 lbs cooked chicken breast, shredded or cubed; 4 cups fresh broccoli florets; 4 oz cream cheese, softened; 1/2 cup heavy cream; 1/2 cup sour cream; 1 teaspoon garlic powder; 1/2 teaspoon onion powder; 1/2 teaspoon salt; 1/4 teaspoon ground black pepper; 2 cups shredded sharp cheddar cheese, divided

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This low-carb chicken and broccoli casserole is a fast dinner option for busy weeknights. It combines tender chicken and steamed broccoli in a rich, cheesy sauce for a satisfying meal.

List of ingredients

1.5 lbs cooked chicken breast, shredded or cubed – use rotisserie for speed.
4 cups fresh broccoli florets – cut into bite-sized pieces.
4 oz cream cheese, softened – ensures a smooth sauce.
1/2 cup heavy cream – provides richness and creaminess.
1/2 cup sour cream – adds a slight tang.
1 teaspoon garlic powder – for savory depth.
1/2 teaspoon onion powder – enhances the aromatic base.
1/2 teaspoon salt – to balance the flavors.
1/4 teaspoon ground black pepper – for a mild spicy kick.
2 cups shredded sharp cheddar cheese, divided – 1 cup for the sauce and 1 cup for the topping.

step-by-step instructions

Prepare Oven and Dish: Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with non-stick spray or butter to prevent sticking.
Steam Broccoli: Place the broccoli florets in a steamer basket over boiling water. Steam for 3-5 minutes until they are bright green and tender-crisp. Drain them thoroughly to remove excess water.
Create Sauce Base: In a large mixing bowl, whisk together the softened cream cheese, heavy cream, sour cream, garlic powder, onion powder, salt, and pepper. Continue whisking until the mixture is completely smooth and lump-free.
Integrate First Layer of Cheese: Stir in 1 cup of the shredded sharp cheddar cheese into the cream mixture until well combined.
Combine Main Ingredients: Gently fold the cooked chicken and the steamed broccoli into the cheese sauce. Stir until every piece of chicken and broccoli is thoroughly coated in the sauce.
Assemble Casserole: Transfer the mixture into the prepared baking dish. Spread it into an even layer using a spatula to ensure uniform cooking.
Add Topping: Sprinkle the remaining 1 cup of shredded cheddar cheese evenly over the top of the casserole.
Bake: Place the dish in the oven and bake for 20 to 25 minutes. Remove when the sauce is bubbling and the cheese on top is melted and slightly golden brown.

Expert Cooking Tips

To achieve the smoothest sauce, ensure your cream cheese is truly softened. You can leave it at room temperature for an hour or microwave it in 10-second bursts. Cold cream cheese often creates lumps that are difficult to whisk out later.

Carefully monitor the broccoli during the steaming process. The goal is tender-crisp, meaning the broccoli should be bright green and offer slight resistance when bitten. Over-steaming will lead to mushy vegetables after the casserole is baked.

Drain the steamed broccoli very well before adding it to the sauce. Use a colander or pat the florets with a paper towel. Excess water will dilute the sauce and can make the bottom of the casserole watery.

Use sharp cheddar cheese rather than mild cheddar. The strong flavor of sharp cheddar cuts through the richness of the heavy cream and cream cheese, providing a more balanced taste profile.

If you are using pre-cooked chicken, ensure it is cut into uniform pieces. This ensures that the chicken heats through evenly and that every bite has a consistent ratio of meat to vegetable.

Ingredient Substitutions

You can replace the fresh broccoli with cauliflower florets if you prefer a milder taste. Follow the same steaming instructions as the broccoli to ensure the texture remains consistent throughout the dish.

For a different cheese profile, try using Pepper Jack instead of sharp cheddar. This will add a medium spicy kick to the casserole without requiring additional spices.

If heavy cream is unavailable, you can use full-fat coconut milk for a dairy-free alternative to the cream. Note that this may slightly alter the flavor and the thickness of the sauce.

To substitute the sour cream, use Greek yogurt. Greek yogurt provides a similar tang and thickness while increasing the protein content of the meal.

If you prefer chicken thighs over breast, simply use the same weight. Chicken thighs often remain more moist during the baking process, which can be beneficial for those who find breast meat too dry.

Creative Flavor Variations

For a boost of earthy flavor, fold in 1/2 cup of sautéed sliced mushrooms before transferring the mixture to the baking dish. Sauté the mushrooms first to remove their moisture so they do not thin out the sauce.

Add a pinch of red pepper flakes to the sauce mixture for a subtle heat. This works particularly well if you are using a milder cheese like Monterey Jack.

Incorporate chopped spinach into the mix for additional nutrients. Stir in fresh baby spinach just before baking; the heat of the oven will wilt the leaves perfectly without requiring pre-cooking.

To add a crunchy element to the top, sprinkle a small amount of almond flour and parmesan cheese over the cheddar. This creates a keto-friendly crust that adds a textural contrast to the creamy interior.

Try adding a teaspoon of Dijon mustard to the sauce. The acidity of the mustard helps brighten the rich flavors of the cheese and cream, adding a professional culinary touch.

Serving and Pairing Suggestions

Serve this casserole directly from the oven to ensure the cheese is at its peak melt. Allow it to rest for 5 minutes before slicing to let the sauce set slightly, which makes serving easier.

Pair the casserole with a fresh side salad. Use a simple vinaigrette of olive oil and lemon juice to provide a refreshing acidity that balances the richness of the cheesy sauce.

For those wanting more volume, serve the casserole over a bed of steamed cauliflower rice. This absorbs any extra sauce and turns the dish into a more filling meal.

Roasted asparagus or sautéed kale make excellent low-carb accompaniments. These green vegetables complement the broccoli and chicken without adding significant carbs.

If serving to a crowd, garnish the top with freshly chopped parsley or chives. The fresh herbs provide a pop of color and a clean flavor that enhances the presentation.

Storage and Preservation

Store any remaining portions in an airtight glass or plastic container. The casserole will stay fresh and safe to eat for up to three days when kept in the refrigerator.

Avoid leaving the casserole at room temperature for more than two hours. Because of the high dairy content, it is susceptible to spoilage if not cooled and refrigerated promptly.

To prevent the sauce from separating during storage, ensure the dish is completely cooled before sealing the lid. This prevents condensation from forming inside the container, which can make the sauce watery.

If you plan to freeze the casserole, it is recommended to freeze it before baking. Assemble the dish, cover tightly with foil, and freeze for up to two months. Thaw in the fridge overnight before baking.

Label your containers with the date of preparation. This helps you track the freshness and ensures you use the leftovers within the recommended three-day window.

Reheating Instructions

For the best texture, reheat portions in the oven at 325°F (160°C). Place the casserole in a small baking dish, cover with foil to retain moisture, and heat until bubbling.

If using a microwave, heat the portion on medium power in 1-minute intervals. Stir gently between intervals to ensure the sauce reheats evenly and does not separate.

Avoid overheating the casserole in the microwave, as this can cause the cheese to become oily and the chicken to toughen. Low and slow is the best approach for dairy-heavy dishes.

If the sauce appears too thick after reheating, stir in a teaspoon of heavy cream or water. This will restore the creamy consistency of the original dish.

When reheating in the oven, removing the foil for the last 2-3 minutes will help recrisp the cheese topping, restoring the golden-brown finish.

Make-Ahead Preparation Guide

You can prepare the sauce and steam the broccoli a day in advance. Store the sauce in a sealed jar and the broccoli in a separate container to maintain the best quality.

For full assembly make-ahead, follow all steps up to the baking stage. Cover the dish tightly with plastic wrap or foil and refrigerate.

When baking a cold casserole from the fridge, increase the bake time by 5-10 minutes. This ensures the center reaches the safe internal temperature for chicken and the sauce is fully heated.

Pre-shredding your own cheese from a block is a great make-ahead tip. Store-bought shredded cheese often contains potato starch to prevent clumping, which adds unnecessary carbs.

Prepare your chicken in bulk at the start of the week. Having cubed or shredded cooked chicken ready in the fridge reduces the assembly time of this recipe to under 10 minutes.

Common Troubleshooting Solutions

If your casserole is too watery, the most likely cause is under-drained broccoli. In the future, use a paper towel to pat the florets dry after steaming. For the current batch, you can bake it for an extra 5 minutes without the cheese topping to evaporate excess liquid.

If the cheese on top burns before the center is hot, lower the oven temperature to 350°F (175°C). You can also cover the dish with foil for the first 15 minutes of baking and remove it only for the final few minutes.

If the sauce is too thick or pasty, you may have over-reduced the cream or used too much cream cheese. Stir in an extra tablespoon of heavy cream or sour cream before baking to loosen the consistency.

If the chicken feels dry, ensure you are not over-baking. Since the chicken is already cooked before it goes into the casserole, the baking process is only to heat it through and melt the cheese.

If the flavor is too bland, increase the salt or add a dash of onion powder. Remember that different brands of cheese have varying salt levels, so always taste your sauce before adding the chicken and broccoli.

Frequently Asked Questions

Can I use frozen broccoli? Yes, frozen broccoli works well. Thaw it completely and squeeze out as much water as possible using a clean kitchen towel to prevent a watery sauce.

Is this recipe suitable for meal prep? Absolutely. This casserole holds up well in the fridge and is an excellent option for low-carb lunches throughout the work week.

Can I make this in a slow cooker? You can, but the texture will differ. Combine the sauce, chicken, and broccoli in the slow cooker on low for 3-4 hours. Transfer to an oven dish to melt and brown the cheese topping.

What is the best way to shred the chicken? Use two forks to pull the breast meat apart while it is still warm. Alternatively, a stand mixer with a paddle attachment can shred 1.5 lbs of chicken in seconds.

Can I use a different type of cream? Half-and-half can be used, but the sauce will be slightly thinner. You may need to add an extra ounce of cream cheese to maintain the thickness.