Cheesy Chicken Broccoli Casserole is a comforting one-dish dinner made with tender chicken, broccoli, a creamy seasoned sauce, and plenty of melted cheese. Everything comes together in one baking dish, making it a practical choice for busy weeknights, family dinners, or make-ahead meals.

The casserole has a creamy center, tender broccoli, juicy chicken, and a golden, cheesy top. It is filling on its own but also pairs easily with a simple salad, roasted vegetables, or warm bread.

Recipe Overview

• Prep Time: 20 minutes
• Cook Time: 30 minutes
• Total Time: 50 minutes
• Servings: 6
• Difficulty: Easy

Why You’ll Love This Recipe

• Easy one-dish dinner: Most of the preparation happens in one casserole dish.
• Creamy and cheesy: A simple creamy sauce and melted cheddar give the casserole its rich texture.
• A practical way to serve broccoli: The broccoli cooks directly in the casserole and absorbs some of the savory sauce.
• Great for busy nights: Cooked chicken makes preparation much faster.
• Family-friendly: The flavors are familiar and easy to customize with your favorite cheese or vegetables.

Ingredients

• 3 cups cooked boneless, skinless chicken breast, shredded or chopped
• 4 cups broccoli florets, cut into bite-size pieces
• 1 can (10.5 ounces) condensed cream of chicken soup
• 1/2 cup sour cream
• 1/2 cup milk
• 1 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2 teaspoon paprika
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 1/2 cups shredded sharp cheddar cheese, divided
• 1/2 cup shredded mozzarella cheese
• 1/3 cup grated Parmesan cheese
• 1/2 cup panko breadcrumbs
• 1 tablespoon melted butter

Ingredient Notes

Chicken: Cooked rotisserie chicken is a convenient option, but leftover roasted or baked chicken works just as well. Cut larger pieces into bite-size pieces so every serving gets a good balance of chicken and broccoli.

Broccoli: Fresh broccoli gives the best texture. Cut the florets relatively small so they become tender without turning mushy.

Cheese: Sharp cheddar provides the strongest cheesy flavor, while mozzarella helps create a stretchy melted layer. Parmesan adds a savory, slightly nutty finish.

Creamy base: Condensed cream of chicken soup creates a thick sauce without requiring a separate white sauce. Sour cream adds creaminess and a little tang.

How to Make Cheesy Chicken Broccoli Casserole

1. Heat the oven.
   Preheat the oven to 375°F. Lightly grease a 9×13-inch baking dish.
2. Prepare the broccoli.
   Bring a pot of water to a boil and blanch the broccoli for about 2 minutes. Drain well and let it cool slightly. This gives the broccoli a head start without making it overly soft in the casserole.
3. Make the creamy sauce.
   In a large bowl, whisk together the cream of chicken soup, sour cream, milk, garlic powder, onion powder, paprika, salt, and black pepper until smooth.
4. Combine the filling.
   Add the cooked chicken, broccoli, 1 cup of the cheddar, mozzarella, and Parmesan. Stir gently until everything is evenly coated.
5. Assemble the casserole.
   Transfer the mixture to the prepared baking dish and spread it into an even layer.
6. Add the topping.
   Sprinkle the remaining 1/2 cup cheddar over the top. Mix the panko breadcrumbs with melted butter and scatter them evenly over the cheese.
7. Bake.
   Bake uncovered for 25–30 minutes, or until the casserole is hot throughout, the cheese is melted, and the edges are bubbling.
8. Rest before serving.
   Let the casserole stand for about 5 minutes before serving. This gives the creamy filling a chance to settle slightly.

Expert Tips

• Drain the broccoli thoroughly. Excess water can make the creamy sauce thinner.
• Use bite-size chicken pieces. Large chunks can make the casserole difficult to serve evenly.
• Don’t overbake. Once the filling is hot and bubbling and the cheese has melted, the casserole is ready.
• For a more golden topping, switch to the broiler for 1–2 minutes at the end, watching closely.
• Grate cheese yourself when possible. It generally melts more smoothly than some pre-shredded varieties.

Common Mistakes to Avoid

Using watery broccoli: Frozen broccoli can work, but thaw and drain it very well first.

Adding too much milk: The casserole needs a thick, creamy filling. Extra liquid can make it loose.

Overcooking the chicken: Since the chicken is already cooked, it only needs to heat through in the casserole.

Cutting into it immediately: A short resting period helps the filling stay together when served.

Easy Variations

• Chicken broccoli pasta casserole: Stir in 2–3 cups of cooked pasta before baking.
• Spicy version: Add 1/4 teaspoon cayenne pepper or a few dashes of hot sauce.
• Extra vegetables: Add sliced mushrooms, peas, or chopped bell peppers.
• Different cheese: Try Monterey Jack, Colby Jack, or a cheddar-Monterey Jack blend.
• Turkey version: Substitute cooked turkey for the chicken, especially when using leftover roasted turkey.

Ingredient Substitutions

You can replace sour cream with plain Greek yogurt for a slightly tangier sauce. Use cooked turkey instead of chicken if desired.

For the condensed soup, cream of mushroom can be used if you prefer a stronger mushroom flavor. If using frozen broccoli instead of fresh, thaw it completely and squeeze or drain away excess moisture before adding it.

What to Serve With It

Because this casserole already contains protein, vegetables, and a creamy sauce, simple sides work best. A crisp green salad adds freshness, while roasted green beans or asparagus provide another vegetable option. Warm dinner rolls or crusty bread are also useful for scooping up the creamy sauce.

Storage & Reheating

Store leftover casserole in an airtight container or tightly covered baking dish in the refrigerator for 3–4 days.

To reheat individual portions, use the microwave until heated through. For larger portions, cover the casserole with foil and warm it in a 350°F oven until hot. Removing the foil near the end can help the cheese topping regain some texture.

The casserole can also be frozen, although the creamy sauce may change slightly in texture after thawing. For best results, cool it completely, wrap it well, and freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.

Frequently Asked Questions

Can I use rotisserie chicken?

Yes. Rotisserie chicken is one of the easiest options for this casserole. Remove the skin and bones, then shred or chop the meat into bite-size pieces.

Can I use frozen broccoli?

Yes. Thaw the broccoli first and drain it very well to prevent excess moisture from thinning the sauce.

Can I make this casserole ahead of time?

Yes. Assemble the casserole, cover it, and refrigerate it until ready to bake. Because the casserole starts cold, it may need several additional minutes in the oven.

Can I add rice?

Absolutely. Stir in about 2 cups of cooked rice for a heartier chicken and broccoli rice casserole. You may need a little extra sauce if adding a large amount of rice.

Why is my casserole watery?

The most common causes are excess moisture from broccoli or other vegetables and adding too much milk. Drain vegetables thoroughly and measure the liquid carefully.

Can I make it without breadcrumbs?

Yes. Simply leave them off and finish the casserole with the cheese topping. The casserole will still have a creamy, cheesy finish.

Final Thoughts

Cheesy Chicken Broccoli Casserole brings together tender chicken, broccoli, creamy sauce, and melted cheese in a simple weeknight-friendly meal. With convenient ingredients and plenty of room for substitutions, it is an easy recipe to keep in your dinner rotation.