Chicken Broccoli Casserole

I grew up watching my mom layer this casserole into a big white baking dish, always the same way—broccoli first, chicken next, then a thick, creamy sauce poured over everything like a warm blanket.

The oven would do the rest, and somehow the whole house smelled like dinner was giving you a hug.

This recipe brings all that back, but with just a bit more care in the ingredients and how they come together.

It’s still rich and cheesy, still topped with those crunchy golden croutons that everyone steals before the dish hits the table.

The broccoli holds its texture, the chicken stays juicy, and the whole thing bakes into a bubbly, golden-topped meal that feels special without trying too hard.

I didn’t try to make it trendy or complicated. Just honest, hearty food made well—because sometimes that’s exactly what feels right.

Chicken Broccoli Casserole Recipe

Ingredients

• 3 cups cooked chicken breast, chopped into bite-size pieces
• 3 cups fresh broccoli florets
• 1 (10.5 oz) can cream of mushroom soup
• 1 cup sour cream
• 1/2 cup mayonnaise
• 1 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2 teaspoon ground black pepper
• 1/4 teaspoon salt (adjust to taste)
• 1 1/2 cups shredded cheddar cheese (mild or medium)
• 1/2 cup shredded mozzarella cheese
• 2 cups seasoned croutons (plain or garlic flavor both work well)
• 1 tablespoon unsalted butter, melted
• Non-stick spray or oil for greasing dish

Instructions

1. Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with non-stick spray or a thin layer of oil.
2. Steam the broccoli florets until just tender—about 3 to 4 minutes. They should be bright green with a slight crunch. Drain and set aside.
3. In a large mixing bowl, combine cream of mushroom soup, sour cream, mayonnaise, garlic powder, onion powder, salt, and pepper. Stir until fully blended and smooth.
4. Fold in the chopped cooked chicken and steamed broccoli. Mix everything together until coated evenly with the creamy mixture.
5. Pour the chicken and broccoli filling into the prepared baking dish and spread it out in an even layer.
6. Sprinkle the shredded cheddar and mozzarella cheeses evenly across the top.
7. In a small bowl, toss the croutons with the melted butter until coated. Scatter them across the top of the casserole.
8. Bake uncovered for 25 to 30 minutes, or until the cheese is bubbling and the croutons are golden brown and crisp.
9. Let rest for 5 minutes before serving to allow everything to settle.

What Is The Best Way To Store Leftover Chicken Broccoli Casserole?

Storing your leftover casserole properly keeps it fresh and safe to eat later. Here’s how to do it the right way:

• Cool Completely First: Let the casserole cool down to room temperature before storing to avoid condensation, which can make it soggy.
• Use An Airtight Container: Transfer the casserole to a sealed container or cover the baking dish tightly with plastic wrap or aluminum foil.
• Refrigeration Time: Store in the refrigerator for up to 3 to 4 days to keep it fresh and safe to eat.
• Freezing Option: If you want to keep it longer, freeze the casserole in a freezer-safe container for up to 2 months.
• Label With Date: Always write the date on your container so you know when it was stored.

When ready to eat, thaw frozen casserole overnight in the fridge and reheat it in the oven until hot and bubbly.

Can I Make This Chicken Broccoli Casserole Ahead Of Time?

Yes, you can prepare this casserole ahead to save time on busy days or for gatherings.

• Assemble And Refrigerate: Mix all ingredients, put them in the baking dish, cover tightly, and keep in the fridge for up to 24 hours before baking.
• Adjust Baking Time: When baking from the fridge, add about 5 to 10 minutes to the original baking time to ensure it heats through.
• Freeze For Longer Prep: You can also freeze the unbaked casserole, wrapped well, for up to 2 months and bake directly from frozen by increasing the cooking time.

What Can I Substitute For Cream Of Mushroom Soup?

If you want to avoid canned soup or don’t like mushrooms, there are simple alternatives that work well:

• Make Your Own Cream Sauce: Use butter, flour, milk, and a little chicken broth to make a homemade creamy base.
• Use Cream Of Chicken Soup: This adds a similar texture with a milder taste.
• Greek Yogurt Or Sour Cream: These can add creaminess but may change the flavor slightly.
• Alfredo Sauce: For a richer taste, this can be a tasty swap.

How Can I Make This Chicken Broccoli Casserole Healthier?

If you want a lighter or more nutritious casserole, here are some easy ways to boost its health benefits:

• Use Low-Fat Dairy: Choose low-fat sour cream, mayonnaise, and cheese to reduce calories.
• Add More Vegetables: Mix in other veggies like carrots, cauliflower, or bell peppers to increase fiber and vitamins.
• Use Whole Wheat Croutons: This adds some extra fiber compared to regular croutons.
• Lean Chicken: Make sure to use skinless, boneless chicken breast to keep it lean.
• Reduce Salt: Adjust the salt amount or use herbs and spices to flavor without adding too much sodium.

What Are Some Tips For Perfect Broccoli In This Casserole?

Broccoli adds great color and nutrition, but cooking it right is key to keep the texture perfect.

• Steam Until Just Tender: Cook broccoli for only 3 to 4 minutes so it stays bright green and slightly crunchy.
• Don’t Overcook: Overcooked broccoli becomes mushy and loses nutrients.
• Drain Well: After steaming, drain any extra water so the casserole doesn’t become watery.
• Use Fresh Broccoli: Fresh florets taste better and hold texture well compared to frozen.

How Do I Reheat Chicken Broccoli Casserole Without Drying It Out?

Reheating casseroles can be tricky, but these tips help keep it moist and tasty:

• Oven Reheating: Cover the casserole with foil and heat in a 350°F oven for 20 to 25 minutes until warmed through.
• Add Moisture: Sprinkle a little water or broth over the casserole before covering to keep it from drying out.
• Microwave Option: Heat individual servings on medium power in short intervals, stirring or checking often.
• Avoid Overheating: Stop reheating as soon as it’s hot to keep the cheese from becoming rubbery.

Can I Use Frozen Broccoli Instead Of Fresh?

Yes, frozen broccoli can be used if fresh is not available, but keep these points in mind:

• Thaw And Drain: Thaw frozen broccoli and squeeze out excess water before mixing to prevent sogginess.
• Shorter Cooking Time: Since frozen broccoli is already blanched, you may need to reduce steaming time or skip it.
• Flavor And Texture: Fresh broccoli usually offers better flavor and texture, but frozen works well for convenience.