Keto Chicken and Broccoli Casserole brings all the creamy, cheesy comfort you crave without derailing your low-carb goals. This budget-friendly dish uses simple ingredients you already have in your kitchen and comes together faster than ordering takeout.
Table of Contents
Ingredients for Keto Chicken and Broccoli Casserole
I’ve tested this recipe dozens of times, and I’ve learned that using rotisserie chicken is a total game-changer for busy weeknights. The quality of your cheese matters too since it creates that creamy sauce everyone craves. Fresh broccoli works better than frozen because it doesn’t release excess water that can make your casserole watery.
- 2 cups cooked chicken breast, shredded or cubed (rotisserie chicken saves time and adds flavor)
- 1 large head of broccoli, chopped into florets (about 4 cups)
- 1 cup shredded sharp cheddar cheese, divided (½ cup for mixing, ½ cup for topping)
- ½ cup grated Parmesan cheese (I recommend freshly grated for smoothest melting)
- 1 cup heavy cream
- ½ cup chicken broth (low-sodium gives you better control)
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- Salt to taste (I usually start with ½ teaspoon)
- Black pepper to taste (freshly ground makes a real difference)
- Cooking spray or butter for greasing the dish
Step-by-Step Instructions
The secret to a perfect casserole is getting the broccoli tender-crisp before baking. Overcooked broccoli turns mushy and releases water, so watch your steaming time carefully.
Step 1: Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with cooking spray or butter. Steam the broccoli florets until tender-crisp, about 5-7 minutes. They should be bright green and slightly tender but still have a bit of bite. Drain them well and pat dry with paper towels to remove excess moisture.
Step 2: In a large mixing bowl, combine the cooked chicken, steamed broccoli, ½ cup of the cheddar cheese, and all of the Parmesan cheese. Use a large spoon to toss gently, distributing everything evenly. Reserve the remaining ½ cup cheddar for topping.
Step 3: In a separate bowl, whisk together the heavy cream, chicken broth, garlic powder, onion powder, salt, and pepper until completely smooth. Taste and adjust seasoning if needed. This sauce should be well-seasoned since it flavors the entire dish.
Step 4: Pour the cream mixture over the chicken and broccoli. Stir gently with a large spoon until everything is evenly coated with the creamy sauce. The mixture should look glossy and well-combined.
Step 5: Transfer the mixture to your prepared 9×13-inch baking dish, spreading it into an even layer with a spatula. Sprinkle the remaining ½ cup of cheddar cheese evenly over the top. This creates that gorgeous golden crust.
Step 6: Bake for 25-30 minutes, or until the casserole is bubbly around the edges with small bubbles breaking through the surface and the cheese on top is melted and golden brown. For extra browning on top, turn on the broiler for the last 2 minutes, watching carefully to prevent burning.
Step 7: Let the casserole cool for 5-10 minutes before serving. This resting time allows the sauce to thicken slightly, making it easier to serve neat portions rather than a soupy mess.
Perfect Pairings for Keto Chicken and Broccoli Casserole
This casserole is hearty enough to stand alone, but pairing it with complementary low-carb sides creates a complete, balanced meal.
Simple Green Salad: A crisp mixed green salad with olive oil and lemon dressing adds freshness and cuts through the richness of the creamy casserole while keeping carbs minimal and adding extra nutrients.
Easy Low-Carb Chicken Casserole: If you love this recipe, you’ll enjoy exploring other low-carb casserole variations that offer different flavor profiles while maintaining the same keto-friendly approach.
Garlic Roasted Vegetables: Roasted zucchini, bell peppers, and mushrooms provide colorful variety and additional vegetables without adding carbs, complementing the casserole’s creamy texture beautifully.
Crispy Oven Roasted Cauliflower: Golden roasted cauliflower florets add a crispy texture contrast to the creamy casserole and double down on cruciferous vegetables for extra nutrition and fiber.
Cauliflower Rice: Fluffy cauliflower rice seasoned with butter and herbs soaks up the creamy sauce beautifully while adding bulk to the meal without carbs, making it feel even more filling and satisfying.
Healthy Sautéed Vegetables: A medley of quick-cooked vegetables adds color, nutrition, and variety to your plate while keeping the entire meal low-carb and keto-compliant.
Keeping It Fresh and Delicious
Store leftover Keto Chicken and Broccoli Casserole in an airtight container in the refrigerator for up to 4 days. The flavors meld together beautifully after a day in the fridge, making leftovers just as delicious as the original meal.
To reheat, place a portion in a microwave-safe dish and heat for 2-3 minutes, stirring halfway through for even heating. For best results, reheat in a 350°F oven for 15-20 minutes until warmed through and bubbly. Add a splash of heavy cream if the sauce seems too thick after refrigeration.
This casserole freezes beautifully for up to 3 months. I recommend freezing it before baking for best texture and freshness. Thaw overnight in the refrigerator, then bake as directed, adding an extra 10-15 minutes to the baking time. You can also portion it into individual servings in freezer-safe containers for easy grab-and-go lunches throughout the month.
FAQs
Can I use frozen broccoli instead of fresh?
Yes, but thaw and drain it thoroughly first. Frozen broccoli contains more moisture, which can make your casserole watery and dilute the creamy sauce. Squeeze out as much liquid as possible before mixing with the other ingredients, and consider patting it dry with paper towels.
How do I make this dairy-free?
Replace the heavy cream with full-fat coconut cream for richness, use nutritional yeast instead of Parmesan for that cheesy flavor, and substitute the cheddar with dairy-free cheese. The texture will be slightly different but still creamy and delicious.
Can I prep this casserole ahead of time?
Absolutely. Assemble the entire casserole up to 24 hours in advance, cover tightly with plastic wrap or aluminum foil, and refrigerate. When ready to bake, let it sit at room temperature for 20 minutes to take off the chill, then bake as directed, adding 5-10 extra minutes if needed since it’s starting cold.
Keto Chicken and Broccoli Casserole
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with cooking spray or butter. Steam the broccoli florets until tender-crisp, about 5-7 minutes. They should be bright green and slightly tender but still have a bit of bite. Drain well and pat dry with paper towels to remove excess moisture.
- In a large mixing bowl, combine the cooked chicken, steamed broccoli, 1/2 cup of the cheddar cheese, and all of the Parmesan cheese. Use a large spoon to toss gently, distributing everything evenly. Reserve the remaining 1/2 cup cheddar for topping.
- In a separate bowl, whisk together the heavy cream, chicken broth, garlic powder, onion powder, salt, and pepper until completely smooth. Taste and adjust seasoning if needed.
- Pour the cream mixture over the chicken and broccoli. Stir gently with a large spoon until everything is evenly coated with the creamy sauce.
- Transfer the mixture to your prepared 9×13-inch baking dish, spreading it into an even layer with a spatula. Sprinkle the remaining 1/2 cup of cheddar cheese evenly over the top.
- Bake for 25-30 minutes, or until the casserole is bubbly around the edges with small bubbles breaking through the surface and the cheese on top is melted and golden brown. For extra browning, turn on the broiler for the last 2 minutes, watching carefully.
- Let the casserole cool for 5-10 minutes before serving. This resting time allows the sauce to thicken slightly, making it easier to serve neat portions.
