Chicken Broccoli Alfredo Bake

This chicken broccoli alfredo bake is a delicious, all-in-one meal that’s perfect for busy nights! Unlike many casseroles that rely on canned soups or store-bought sauces, this recipe is made completely from scratch for a fresher, tastier dish you can feel good about.

I love cooking from scratch, but I totally get that some recipes can feel overwhelming or take too long. That’s why I’ve simplified this chicken broccoli alfredo bake with easy steps that don’t skimp on flavor—so you can enjoy a homemade dinner without extra stress.

The best part about this chicken broccoli alfredo bake is how flexible it is. You can swap in your favorite veggies or pasta shapes, making it a great fit for whatever you have on hand or your family’s tastes. Whether it’s a busy weeknight or a cozy weekend dinner, this recipe is a wonderful homemade alternative to processed meals.

Hello and welcome! This chicken broccoli alfredo bake brings you all the creamy, cheesy comfort of a pasta casserole without turning to canned soups or pre-made sauces. You’ll make a simple, scratch Alfredo sauce from butter, flour, milk (and half-and-half for creaminess), Parmesan, and mozzarella. Then it gets mixed with tender pasta, fresh broccoli, and cooked chicken for an easy, all-in-one dinner.

Keep reading for a clear recipe card, step-by-step photos, smart tips for making ahead, and a few tasty variations so you can tailor this dish just the way your family likes it. Here’s what to expect:

• A hands-on but straightforward recipe that takes about 45 minutes total (around 25 minutes prep, 20 minutes baking).
• A sauce made from scratch—no canned soup here! Just a simple roux and real cheese for a rich, creamy sauce.
• Flexible and family-friendly—uses leftover cooked chicken and lets you switch up pasta, veggies, and cheeses easily.
• Make-ahead friendly—you can prep it earlier and add a splash more milk to keep it moist.
• Storage tips—it’s best kept in the fridge and eaten within 3–4 days since the creamy sauce doesn’t freeze well.

What Makes It So Good

This chicken broccoli alfredo bake is a winner because it brings loads of comforting flavor with a homemade touch—without the hassle of canned or processed ingredients.

• A rich, scratch-made Alfredo sauce with butter, flour, milk, half-and-half, Parmesan, and mozzarella that’s creamy and satisfying.
• Quick and convenient—about 45 minutes from start to finish, plus it uses leftover cooked chicken for a speedy prep.
• One-dish meal the whole family will enjoy—pasta, chicken, and broccoli come together for a hearty, filling dish that feeds about six people.
• So versatile—you can swap in peas, change up the pasta shapes like penne or rigatoni, or try different cheeses like cheddar or extra Parmesan.
• Great for making ahead—just assemble early, refrigerate, and bake when you’re ready. Adding extra milk helps keep the casserole nice and creamy.
• Customize the texture—double the sauce if you want it extra velvet, or finish with the broiler for a golden, bubbly top.
• Keep in mind, because of the creamy sauce, this casserole doesn’t freeze well. Stick to refrigeration and enjoy within a few days.

Ingredients and Smart Swaps

• 1 pound rigatoni pasta
• 2 cups broccoli (cut into bite sized pieces)
• 3 tablespoons salted butter
• 3 tablespoons flour
• 1 clove garlic (minced)
• 2 ½ cups milk
• 1 cup half and half cream
• ½ teaspoon salt
• ¼ teaspoon pepper
• ½ cup mozzarella cheese (shredded)
• ½ cup parmesan cheese (shredded)
• 2 cups cooked chicken (cubed)
• ¼ cup parmesan cheese (shredded, for topping)

How to Make It

1. Cook the pasta until al dente.
2. Steam the broccoli until tender but still bright green.
3. Melt butter in a saucepan over medium heat and whisk in the flour; cook 1–2 minutes to form a roux.
4. Add minced garlic and cook about 30 seconds until fragrant.

5. Slowly whisk in the milk and half-and-half, stirring constantly until the sauce thickens and coats the back of a spoon; remove from heat.

   

6. Season the sauce with salt and pepper, then whisk in shredded mozzarella and Parmesan until melted and smooth.
7. Combine the cooked pasta, steamed broccoli, and cubed cooked chicken with the Alfredo sauce in a large bowl.
8. Transfer the mixture to a greased 9×13-inch baking dish and sprinkle additional Parmesan on top.
9. Bake uncovered at 350°F for 20–25 minutes until bubbly and lightly browned on top.
10. Optional: broil 1–2 minutes to brown the top, watching closely.
11. Let the casserole rest a few minutes before serving.

Pro Tips for Best Results

• Always taste the sauce before combining to make sure the seasoning is just right. Add salt or pepper if you think it needs it.
• Want your chicken broccoli alfredo bake extra creamy? Double the sauce recipe for a truly rich, cheesy dish.
• Remember to bake uncovered at 350°F for the best texture and flavor.
• For a beautifully browned top, sneak the casserole under the broiler for a couple of minutes at the end of baking—but watch it closely to avoid burning.

To make ahead of time

• If you’re prepping ahead, make the Alfredo sauce adding an extra ¾ cup of milk. This helps keep the casserole from drying out when you bake it later.
• Put the casserole together, cover it tightly, and chill in the fridge.
• When ready to bake, cover with foil and bake at 350°F for 20 minutes. Remove the foil and bake another 15-20 minutes until heated through and bubbly.

Serve this comforting chicken broccoli alfredo bake straight from the casserole dish. Make sure to use a trivet to protect your table or counter, and grab a hot pad since it will be piping hot fresh from the oven.

Pair it with a crisp green salad dressed with lemon vinaigrette and garlic croutons, and don’t forget some warm, homemade breadsticks to soak up every last bit of that sauce!

Mix-Ins and Flavor Twists

• Switch out broccoli for frozen peas—just toss them in frozen and they’ll cook up during baking.
• Mix up the protein with leftover turkey or ham for a fun change.
• Try cheddar cheese in place of mozzarella and sprinkle some on top for a sharper flavor.
• If your family loves a little heat, stir ¼ teaspoon of red pepper flakes right into the Alfredo sauce.

Storage and Make-Ahead Tips

Cover leftovers well and store them in the fridge. They’ll keep nicely for 3 to 4 days. When you’re ready to eat, reheat a serving in the microwave for 1 to 1 ½ minutes until warmed through.

Can you freeze chicken alfredo broccoli bake?

Because of the creamy sauce, this chicken broccoli alfredo bake doesn’t freeze well and is best enjoyed fresh or refrigerated.

Answers to Common Questions

What’s the best way to reheat leftover chicken alfredo?

Grab a single portion and place it in a microwave-safe dish. Cover with a paper towel to keep it from drying out. Microwave for one minute, stir gently, then heat for another 30-60 seconds until hot all the way through.