Broccoli Chicken Casserole
A comforting and creamy casserole loaded with chicken, broccoli, and cheese, perfect for busy weeknights.
I’ve been making this Broccoli Chicken Casserole on repeat for busy weeknights — it’s one of those meals that hits the comfort-food sweet spot without collapsing into takeout territory. It’s quick to pull together, uses pantry-friendly ingredients, and reheats beautifully, which is why it’s my go-to when I need something satisfying and practically effortless. For a spicier pasta sibling, I sometimes pair it with a dish like creamy Cajun chicken-broccoli pasta for variety on the table.
Why you’ll love this dish
This casserole feels like a hug in a baking dish: cheesy, creamy, and loaded with protein and vegetables. It’s perfect for weeknight dinners, potlucks, or when you want to feed a small crowd without fuss. A few reasons people search for and make this:
- Fast assembly: most of the work is done before baking — cook the pasta and chicken ahead to shave time.
- Balanced: chicken and broccoli add protein and veggies so it’s more nourishing than many comfort casseroles.
- Kid-friendly: mild flavors and gooey cheddar usually win over picky eaters.
- Flexible: swap the pasta shape or dairy to suit needs and what’s in the fridge.
How this recipe comes together
Start by sautéing mushrooms and building a simple creamy sauce with milk or cream and garlic powder. Combine that sauce with cooked pasta, shredded chicken, and broccoli so everything is evenly coated. Transfer to a greased baking dish, top with cheddar and optional breadcrumbs, then bake until bubbling and golden. The oven finishes the dish, melting the cheese and melding the flavors while keeping the broccoli tender-crisp if you don’t overbake.
What you’ll need
- 2 cups broccoli florets (fresh or briefly steamed frozen)
- 2 cups cooked chicken, shredded (rotisserie chicken or leftovers work great)
- 2 cups cooked pasta (elbow, penne, rotini — any short pasta)
- 1 cup cheddar cheese, shredded (sharp cheddar gives more flavor)
- 1 cup mushrooms, sliced (button or cremini)
- 1 cup cream or milk (whole milk, half-and-half, or a lighter milk — cream makes it richer)
- 2 tablespoons olive oil
- 1 teaspoon garlic powder
- Salt and pepper to taste
- Optional: breadcrumbs for topping (Panko gives a crisp finish)
Substitution notes: use Greek yogurt thinned with a little milk for a tangier, lower-fat sauce; swap mozzarella for a milder cheese; add a squeeze of lemon if your broccoli tastes flat.
Step-by-step instructions
- Preheat the oven to 350°F (175°C) and grease a baking dish.
- Heat olive oil in a large skillet over medium heat. Add the sliced mushrooms and cook until they release their liquid and soften (about 4–6 minutes).
- Reduce heat slightly and stir in the cream or milk. Sprinkle in garlic powder, then season with salt and pepper. Let the sauce warm and thicken for 2–3 minutes; don’t boil.
- In a large bowl, combine the cooked pasta, shredded chicken, and broccoli. Pour the mushroom-cream mixture over and toss until everything is evenly coated.
- Transfer the mixture to the prepared baking dish, spreading it into an even layer. Sprinkle the shredded cheddar across the top. Add optional breadcrumbs for crunch.
- Bake 25–30 minutes, until the cheese is bubbly and edges are golden. If you added breadcrumbs, they should be crisp and browned.
- Let rest 5 minutes before serving so the casserole firms up slightly. Serve warm.
01Ingredients
Main Ingredients
02Method
- Preparation
- Baking
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0 OF 7 DONE03Recipe notes
- 01For a lighter meal, serve smaller portions and bulk up the plate with a large mixed greens salad. For a heartier dinner, a side of garlic bread complements the cheesy sauce.
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Best ways to enjoy it
Plate single servings with a bit of parsley on top for color. Pair the casserole with:
- A crisp green salad dressed with lemon vinaigrette to cut the richness.
- Roasted carrots or a simple cucumber salad for fresher textures.
- Warm crusty bread if you want extra dipping power.
For a lighter meal, serve smaller portions and bulk up the plate with a large mixed greens salad. For a heartier dinner, a side of garlic bread complements the cheesy sauce.
Storage and reheating tips
Refrigerator: Cool leftovers to room temperature, cover, and store in the fridge for up to 3–4 days.
Reheating: Reheat individual portions in the microwave for 90–120 seconds, stirring halfway. For a crisper top, reheat in a 350°F oven for 10–15 minutes.
Freezing: To freeze, place cooled casserole in an airtight container for up to 2 months. Thaw overnight in the fridge before reheating; add a few extra minutes in the oven.
Food safety: Always refrigerate within 2 hours of cooking and reheat to 165°F (74°C) before eating.
Creative twists
- Mushroom-free: add roasted red peppers or sun-dried tomatoes for a brighter flavor.
- Cheesy variations: swap half the cheddar for Gruyère or smoked gouda for depth.
- Grain swap: replace pasta with cooked rice or quinoa for a different texture.
- Spice it up: stir in ½–1 teaspoon smoked paprika or a pinch of red pepper flakes for warmth.
- Gluten-free: use gluten-free pasta and omit breadcrumbs or use gluten-free breadcrumbs.
Your questions answered
How long does this casserole take from start to finish?
A: Active prep is about 15–20 minutes if chicken and pasta are already cooked. If starting raw, add time to cook and cool the pasta and chicken; total oven time is 25–30 minutes.
Can I make this ahead and bake later?
A: Yes. Assemble the casserole, cover tightly, and refrigerate for up to 24 hours before baking. Add a few extra minutes to the bake time if chilled.
Can I use frozen broccoli?
A: Yes—thaw and drain it well or briefly steam frozen florets before mixing to avoid extra water in the casserole.
Is milk ok instead of cream?
A: Absolutely. Milk yields a lighter sauce; if it seems thin, stir in 1 tablespoon of flour or cornstarch mixed with cold water to thicken slightly before combining.
Can I make this vegetarian?
A: Replace chicken with chickpeas, extra mushrooms, or a plant-based chicken substitute and use vegetable broth-thinned milk or cream alternatives.
Conclusion
This Broccoli Chicken Casserole is an easy, crowd-pleasing weeknight dinner that balances convenience and nourishment. For more ideas, check out Chicken Broccoli Rice Casserole – The Cozy Cook and my Chicken Broccoli Rice Cheese Casserole.
Breakfast
Casseroles
Casseroles
