Baked Creamy Chicken Alfredo Casserole with Broccoli

Broccoli Chicken Alfredo Casserole is a creamy, comforting weeknight dinner that comes together quickly and stores well for busy nights. Layers of tender chicken and bright green broccoli are coated in a rich Alfredo sauce, topped with grated Parmesan, and baked until bubbly. This casserole is perfect for make-ahead meals, freezer-friendly dinners, or feeding a small family with minimal fuss.

Why You’ll Love This Creamy Broccoli Chicken Alfredo Casserole

• Creamy and cheesy: A smooth Alfredo sauce and Parmesan make every bite indulgent without a lot of effort.
• Make-ahead friendly: Assemble now and bake later, or freeze the uncooked casserole for months.
• Family-approved: The mild, comforting flavors appeal to kids and adults alike and make veggies easy to serve.
• Flexible: Serve it over pasta, rice, or cauliflower rice, or enjoy it on its own with a simple side salad.

Ingredients for Broccoli Chicken Alfredo Bake

Below is a straightforward ingredient list to get you started. You can scale the quantities up or down depending on how many people you’re serving.

• 2 large skinless, boneless chicken breasts, cooked and diced (rotisserie or leftover chicken works well)
• 2 1/2 cups broccoli crowns, trimmed and blanched (see tips below)
• 3/4 cup jarred Alfredo sauce (use your preferred brand)
• 1/4 cup milk (2% or whole milk both work)
• 1/2 cup grated Parmesan cheese

How to Portion, Cook, and Freeze This Recipe

This casserole is easy to adapt to your household and schedule:

• For two people: Halve the ingredients and bake in a 5-cup or similarly sized small casserole dish.
• To freeze ahead: Assemble the casserole without baking, cover tightly with foil or an airtight lid, and freeze for up to 3 months.
• Baking from the fridge: If refrigerated overnight, bake at 375°F (190°C) for 25–30 minutes, until the sauce bubbles and the cheese is melted and lightly browned.
• Baking from frozen: Remove foil and bake covered at 350°F (175°C) for 45–50 minutes, then uncover for 10–15 minutes if you want a browned top. Check that the casserole is heated through.

Simple Instructions for Making Broccoli Chicken Alfredo

These steps are quick and reliable. See the recipe card below for a concise ingredient list and full instructions.

Step-by-Step Directions

1. Preheat the oven to 375°F (190°C).
2. Blanch the broccoli: Bring a pot of salted water to a boil, add trimmed broccoli crowns, and cook just until the florets turn bright green (about 2–3 minutes). Drain and immediately rinse with cold water to stop cooking and keep the broccoli crisp-tender.
3. In an 8- or 9-inch square baking dish, spread the diced cooked chicken in an even layer. Add the blanched broccoli on top of the chicken.
4. Whisk the Alfredo sauce and milk together until smooth, pour the sauce over the chicken and broccoli, and stir gently in the pan so ingredients are evenly coated. Sprinkle the top with grated Parmesan.
5. Bake uncovered for 25–30 minutes, or until the sauce is bubbling and the cheese is melted and lightly golden. Let rest a few minutes before serving; the sauce will thicken as it cools.

Helpful Tips

• Time-savers: Use rotisserie chicken or pre-cooked chicken breasts to cut prep time. Jarred Alfredo sauce makes the recipe fast and simple.
• Prevent sogginess: Blanching the broccoli and shocking it in cold water keeps it from overcooking in the oven.
• Stretch the sauce: If the casserole looks dry before baking, add a splash more milk or a tablespoon of cream to ensure everything is well-coated.
• Freezing: Assemble the casserole and cover tightly before freezing. Thaw overnight in the refrigerator and bake as directed for best results.

Recipe Card

Yield: 4 servings   |   Prep time: 10 minutes   |   Cook time: 30 minutes   |   Total time: 40 minutes

Ingredients

• 2 large cooked, diced chicken breasts
• 2 1/2 cups broccoli crowns, trimmed and blanched
• 3/4 cup Alfredo sauce
• 1/4 cup milk
• 1/2 cup grated Parmesan cheese

Instructions

1. Blanch broccoli until bright green, drain, and cool in cold water.
2. Layer cooked chicken and broccoli in an 8- or 9-inch baking dish.
3. Combine Alfredo sauce and milk, pour over the chicken and broccoli, and stir to coat evenly. Top with Parmesan.
4. Bake uncovered at 375°F for 25–30 minutes until bubbling and the cheese is golden.

Notes

The sauce will thicken slightly as it cools. To freeze, assemble before baking, cover tightly, and store for up to 3 months. Thaw overnight and bake according to the directions above.

Side Dishes That Pair Well

• Cooked pasta or egg noodles, served with the casserole spooned on top
• A crisp green salad with a bright vinaigrette to balance the richness
• Fresh bread, rolls, or garlic toast for dipping in the creamy sauce

Other Casserole Ideas

• Chicken casserole with Swiss cheese and stuffing
• Leftover turkey casserole made with cooked, diced poultry
• Beef and biscuit casserole (hamburger casserole)
• Classic chicken and broccoli casserole with curry or a creamy sauce
• Cheeseburger-style casserole topped with biscuits

Pin this recipe to save it for later and enjoy an easy, freezer-friendly casserole that’s comforting, quick to assemble, and always satisfying.