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If you’re looking for a cozy, family-friendly dinner that’s low in carbs but big on comfort, Creamy Keto Broccoli Chicken Casserole checks every box. This dish combines tender chicken, crisp-tender broccoli, and a luxuriously creamy cheese sauce that melts together as it bakes. It’s perfect for busy weeknights, meal prep, or anyone wanting a simple keto dinner that tastes anything but “diet-friendly.” With minimal prep and everyday ingredients, it’s a fuss-free casserole that delivers rich flavor in every bite.

Why You’ll Love This Recipe

Keto-friendly without sacrifice: Low in carbs yet incredibly comforting and filling.
Easy weeknight dinner: Uses rotisserie or leftover chicken to save time.
Creamy, cheesy, and flavorful: Every ingredient adds richness without being heavy.
Meal-prep friendly: Reheats beautifully and stays creamy even after storing.
Customizable: Add veggies, adjust spices, or change cheeses for endless versions.
Family-approved: Even non-keto eaters love this hearty, comforting casserole.

Ingredients You’ll Need

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

3 cups cooked, shredded chicken (rotisserie works great)
4 cups fresh broccoli florets, lightly steamed or blanched
1 1/2 cups shredded cheddar cheese
1 cup shredded mozzarella cheese
4 oz cream cheese, softened
1/2 cup sour cream
1/4 cup mayonnaise
1/4 cup grated Parmesan cheese
1/2 teaspoon garlic powder
1/2 teaspoon onion powder
1/4 teaspoon paprika (optional)
Salt and pepper, to taste
2 tablespoons chopped fresh parsley, for garnish
Cooking spray or butter, for greasing the baking dish

These simple ingredients work together to create a creamy sauce that bakes into a perfectly cheesy, golden casserole.

Let’s Get Started

Prep the oven and pan:
Preheat your oven to 375°F (190°C). Lightly grease a 9×13 baking dish with cooking spray or butter.
Prepare the broccoli:
Steam or blanch broccoli until crisp-tender, about 3–4 minutes. Drain well to prevent a watery casserole.
Mix the creamy sauce:
In a large bowl, whisk together softened cream cheese, sour cream, mayonnaise, garlic powder, onion powder, paprika, salt, and pepper. Stir until smooth and well combined.
Add the cheeses:
Mix in the Parmesan cheese, 1 cup of cheddar, and 1/2 cup mozzarella. The remaining cheese will be used for topping.
Combine chicken and broccoli:
Add shredded chicken and prepared broccoli to the bowl, gently folding until everything is coated in the creamy sauce.
Transfer to baking dish:
Spread the mixture evenly into the greased casserole dish.
Finish with cheese:
Sprinkle the remaining cheddar and mozzarella evenly on top.
Bake:
Bake uncovered for 25–30 minutes, or until hot, bubbly, and lightly golden on top.
Garnish and serve:
Let cool for 5 minutes, then top with fresh parsley before serving.

Servings and Pairing

This casserole serves 6 hearty portions, making it ideal for families or weekly meal prep.

Pairing ideas:

A crisp green salad with olive oil and lemon
Roasted asparagus or zucchini
Cauliflower rice to complete a keto-friendly plate
Keto garlic bread for a cozy, comfort-food meal

Variations

Customize the casserole to fit your taste or ingredients on hand:

Protein Swaps

Turkey
Shredded pork
Ground chicken or turkey (cooked and seasoned)

Cheese Variations

Gruyere for a nutty flavor
Pepper Jack for a spicy kick
Swiss or provolone for a milder, melty finish

Veggie Add-Ins (still keto-friendly)

Spinach (fresh or lightly wilted)
Cauliflower florets
Mushrooms, sautéed
Green beans, steamed

Low-Carb Crunch Topping

Mix almond flour with melted butter and Parmesan for a golden, crunchy crust.

Storage Tips

Refrigerator: Store leftovers in an airtight container for up to 4 days.
Freezer: Freeze tightly wrapped or in freezer-friendly containers for up to 2 months.
Reheating: Warm individual portions in the microwave, or reheat the whole dish in the oven at 350°F until heated through.

The casserole keeps its creamy texture well, making it great for batch cooking or freezing ahead for busy nights.

FAQs

Can I use frozen broccoli?

Yes, but thaw completely and pat dry to avoid extra moisture.

Is this casserole gluten-free?

Yes—there are no flours, breadcrumbs, or gluten-containing ingredients.

Can I make it ahead of time?

Absolutely. Assemble the casserole, cover, and refrigerate for up to 24 hours. Add 5–10 extra minutes of baking time.

What if I don’t like mayonnaise?

You can replace it with additional sour cream or Greek yogurt, though carbs will increase slightly.

Can I add more protein?

Yes—crisp bacon or diced ham are great additions.

Final Thoughts

Creamy Keto Broccoli Chicken Casserole is the kind of dependable, delicious recipe you’ll find yourself returning to again and again. It’s rich, cheesy, satisfying, and incredibly simple to prepare—even on the busiest weeknights. Whether you’re cooking for picky eaters, feeding a family, or sticking to low-carb goals, this casserole checks every box. Warm, comforting, and endlessly adaptable, it’s a keto staple that delivers both flavor and convenience in one irresistible dish.