Chicken Broccoli Casserole

The smell of this casserole baking takes me back to rainy Tuesday evenings when my kids were small and everyone needed something warm and forgiving. I started making it when I discovered a container of leftover rotisserie chicken and a bag of broccoli that needed rescuing. Now it is the dinner my family actually cheers for when they walk through the door.

Last winter my neighbor brought over a container when I was recovering from surgery and it was the first thing I actually wanted to eat. She told me her grandmother made it for Sunday suppers and I have been making it my own ever since. There is something about the combination of tender chicken and bright broccoli nestled in that creamy sauce that feels like a hug.

Ingredients

• 3 cups cooked chicken breast: Rotisserie chicken works beautifully here and saves so much time
• 4 cups broccoli florets: Fresh broccoli holds up better but frozen works fine if thawed and drained well
• 1 small yellow onion: Finely chopped so it melts into the sauce rather than staying in distinct pieces
• 1 1/2 cups shredded cheddar cheese: Sharp cheddar gives you the most flavor but medium works if that is what your family prefers
• 1 cup sour cream: Full fat sour cream creates the richest creamiest texture I have found
• 1/2 cup milk: Whole milk is best but whatever you have in the fridge will work
• 1 can (10.5 oz) condensed cream of chicken soup: This is the shortcut that makes everything come together so seamlessly
• 1 cup cooked white rice: Optional but stretches the casserole and makes it feel more complete
• 1/2 cup panko breadcrumbs: They create the most perfect crispy topping that everyone fights over
• 2 tbsp unsalted butter melted: Tossing the panko with butter is the secret to golden irresistible crunch
• 1/2 tsp garlic powder: Rounds out the flavor without being too aggressive
• 1/2 tsp salt and 1/4 tsp black pepper: Adjust these to your taste since the soup already has salt
• 1/4 tsp paprika: Mostly for color but adds a lovely subtle warmth

Instructions

Get your oven ready:

Preheat to 375°F and grease a 9x13 inch baking dish with butter or cooking spray

Prep the broccoli:

Steam or blanch those florets for just 2 to 3 minutes until they turn bright green but still have some snap then drain them really well

Mix everything together:

In a big bowl combine the chicken broccoli onion 1 cup of cheese soup sour cream milk rice if using garlic powder salt and pepper until everything is evenly coated

Spread it out:

Pour the mixture into your prepared dish and spread it into an even layer

Make the topping:

Stir together the panko melted butter and paprika in a small bowl until the breadcrumbs are evenly coated

Add the layers:

Sprinkle the remaining 1/2 cup of cheese over the casserole then scatter that buttery panko on top

Bake until golden:

Bake uncovered for 30 to 35 minutes until the sauce is bubbling around the edges and that topping is gorgeously browned

Let it rest:

Give the casserole 5 minutes to set before serving so it holds its shape better on the plate

Save

My daughter requested this for her birthday dinner instead of going out to a restaurant which I took as the highest compliment. There is something so deeply satisfying about watching people scrape their plates clean and ask if there is more.

Making It Ahead

I often assemble the entire casserole the night before and keep it in the refrigerator covered with foil. Just add 5 to 10 minutes to the baking time since it will be cold going into the oven. The topping stays surprisingly crispy even when made ahead.

Freezing Instructions

This casserole freezes beautifully either before or after baking. I like to bake it first let it cool completely then wrap it tightly in foil and freeze for up to 3 months. Thaw overnight in the refrigerator and reheat at 350°F until hot throughout.

Serving Suggestions

A crisp green salad with a tangy vinaigrette cuts through the richness perfectly. Some nights I just serve it with buttery crusty bread for soaking up that creamy sauce.

• A side of roasted carrots adds color and sweetness
• Crispy garlic bread turns this into a full meal
• Steamed green beans stay light and fresh alongside

Save

This is the kind of recipe that makes a house feel like home. I hope it becomes a staple in your kitchen too.

Recipe FAQs

→ Can I make this ahead of time?

Yes, assemble the entire dish up to 24 hours in advance and refrigerate. When ready to bake, add an extra 10-15 minutes to the cooking time since it will be cold.

→ Can I freeze this casserole?

Absolutely. Wrap the unbaked casserole tightly with plastic wrap and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.

→ What can I use instead of cream of chicken soup?

You can substitute with cream of mushroom soup for a different flavor profile, or make a homemade sauce using butter, flour, chicken broth, and milk for a less processed version.

→ Can I use raw chicken?

This recipe works best with cooked chicken. You can poach, bake, or grill chicken breasts specifically for this dish, or use leftover rotisserie chicken for a quick shortcut.

→ How do I know when it's done?

The casserole is ready when the sauce is bubbling around the edges and the breadcrumb topping turns golden brown. The internal temperature should reach 165°F (74°C) for food safety.