Chicken Broccoli Pasta Bake with Mushrooms – Easy & Cheesy

There’s something magical about pulling a golden, bubbling casserole out of the oven after a long day. Especially when it’s packed with hearty pasta, tender chicken, earthy mushrooms, and crisp-tender broccoli—all coated in a creamy, cheesy sauce that smells like home. This Creamy Chicken Broccoli Pasta Bake with Mushrooms is the kind of meal you’ll crave on chilly evenings, share at family gatherings, or turn to when you need dinner to stretch across a few comforting servings.

I first made this dish on a Sunday night when I had bits and pieces left in the fridge—some rotisserie chicken, half a head of broccoli, a handful of mushrooms that were about to go, and a block of sharp cheddar begging to be used. The result was so good that it became an instant favorite. Now, I make it regularly, tweaking it slightly based on what I have on hand, but always coming back to this cozy base of creamy pasta and melty cheese.

One of the best parts about this recipe is how flexible it is. You can use any type of pasta you love—regular penne, whole wheat fusilli, even gluten-free noodles if that’s what works best for your family. And while I usually reach for fresh broccoli and baby bella mushrooms, frozen broccoli or even spinach works in a pinch. The base flavors—savory garlic and onion, hearty mushrooms, and the zing of Dijon mustard—create a sauce that clings to every bite of pasta in the most satisfying way.

And the best part? It’s all made with simple pantry staples and comes together quickly, making it ideal for busy weeknights or lazy Sunday meal prep. If you’re craving something cozy and nourishing but also straightforward enough to pull off with minimal fuss, this dish will hit the spot.

Why You’ll Love This Recipe

There are plenty of baked pasta recipes out there, but this one checks all the boxes for a reliable, go-to comfort meal. It’s easy to love, and here’s why it’ll likely become a staple in your kitchen, too.

1. It’s Perfectly Creamy Without Being Overwhelming

Thanks to a simple roux made with a little butter, flour, milk, and stock, the sauce is velvety and rich without being too heavy. Dijon mustard adds a subtle tang that cuts through the richness and brings balance, while sharp cheddar gives the dish that cheesy depth we all crave.

2. Family-Friendly and Kid-Approved

There’s something for everyone in this bake. Kids love the creamy cheese and pasta, and you’ll feel great knowing it’s also packed with veggies and lean protein. It’s a great way to sneak broccoli into dinner without complaints.

3. It Uses Leftovers Like a Pro

Got leftover cooked chicken in the fridge? This recipe transforms it into something new and exciting. Whether it’s rotisserie chicken or sautéed chicken breast from a previous meal, this bake gives it new life.

4. One Dish, Many Meals

This pasta bake makes enough to feed a crowd—or give you plenty of leftovers to enjoy later. You can make it ahead, freeze it, and reheat it easily throughout the week. That kind of versatility makes it perfect for meal prep.

5. Simple Ingredients, Big Flavor

Even though it relies on everyday pantry and fridge staples, each ingredient in this dish plays an important role. Mushrooms bring that deep umami, the cheese adds richness, and the broccoli provides freshness and color. It all comes together for a satisfying, balanced meal.

6. Make It Your Own

Want to spice it up? Add red pepper flakes or a dash of hot sauce. Need it gluten-free? Swap in gluten-free pasta and flour. You can customize this recipe in so many ways, and it’ll still turn out delicious every time.

Health Benefits

Just because it’s a cheesy pasta bake doesn’t mean it can’t have solid nutritional value. In fact, this dish strikes a wonderful balance between indulgent comfort and wholesome goodness. Let’s take a closer look at how each ingredient contributes to the health profile of this meal.

1. Lean Protein from Chicken

Using cooked chicken breast or rotisserie chicken provides a lean, protein-rich base for this dish. Protein is essential for muscle repair, immune support, and satiety. Including a good amount of it helps balance the carbs from the pasta and gives the dish lasting power.

2. Nutrient-Rich Broccoli

Broccoli is a powerhouse veggie, high in fiber, vitamin C, vitamin K, iron, and potassium. It’s also rich in antioxidants, which support the immune system and help reduce inflammation. Plus, its slightly bitter flavor contrasts beautifully with the richness of the cheese sauce.

3. Mushrooms for Immune Support

Baby bella mushrooms offer a savory, meaty flavor without adding extra fat or calories. They’re also a surprising source of nutrients like B vitamins, selenium, and copper. Mushrooms have been studied for their immune-supporting and anti-inflammatory benefits as well.

4. Calcium and Healthy Fats from Cheese

Cheese adds flavor and creaminess, but it also brings calcium and protein to the table. Using sharp cheddar means you get maximum flavor with less cheese, keeping the overall fat content more moderate while still giving you that crave-worthy cheesy bite.

5. Complex Carbohydrates from Pasta

Pasta provides the carbohydrate base for this dish, giving you the energy to power through your day. Choose whole wheat or legume-based pasta for added fiber and protein, or go with traditional pasta for that classic texture and flavor.

6. Homemade Sauce with Wholesome Ingredients

Instead of reaching for a jarred sauce full of preservatives and added sugar, this recipe uses a simple homemade base with milk, flour, broth, and Dijon mustard. It’s fresher, lighter, and allows you to control the ingredients entirely.

When all these elements come together, you get a comforting, satisfying meal that doesn’t skimp on nourishment.

Preparation Time, Servings, and Nutritional Information

Before diving into the kitchen, let’s go over the time commitment and what you can expect from each serving. Spoiler alert: it’s weeknight-friendly and great for meal prep.

Total Time

• Prep Time: 15–20 minutes
• Cook Time: 25 minutes
• Total Time: 40–45 minutes

Servings

• Serves: 6 generous portions

Nutrition Facts (per serving, approximate)

• Calories: 480
• Protein: 28g
• Carbohydrates: 45g
• Fat: 20g
• Fiber: 5g
• Calcium: 25% Daily Value
• Iron: 15% Daily Value

These values will vary slightly depending on the exact ingredients you use—especially if you opt for different pasta types or lower-fat cheese. But overall, this dish offers a balanced blend of protein, fiber, and healthy fats, making it a satisfying main meal.

Ingredients List

Here’s what you’ll need to bring this cozy, comforting pasta bake to life. Most of these ingredients are probably already in your pantry or fridge, which is part of what makes this dish so accessible.

Main Ingredients

• 8 ounces pasta (penne, rotini, fusilli, or any shape you like – regular, whole wheat, or gluten-free)
• 2 cups broccoli florets (fresh or frozen)
• 2 cups cooked chicken (shredded or chopped, rotisserie or sautéed)
• 1 cup baby bella mushrooms, sliced
• 1 small yellow onion, diced
• 3 cloves garlic, minced

For the Sauce

• 2 tablespoons olive oil or butter (for sautéing)
• 2 tablespoons all-purpose flour
• 1 ½ cups milk (whole or 2% works best)
• 1 cup chicken or vegetable stock (low-sodium preferred)
• 1 teaspoon Dijon mustard
• 1 teaspoon salt (adjust to taste)
• ½ teaspoon black pepper

For the Cheese

• 1 ½ cups shredded sharp cheddar cheese, divided (freshly grated melts better)

Optional for Garnish

• Chopped parsley
• Extra cracked black pepper
• A sprinkle of paprika

Each of these ingredients contributes something important—whether it’s richness, flavor, or texture. If you want to mix things up, we’ll talk more about substitutions and variations later.

Step-By-Step Cooking Instructions

Now let’s get into the heart of the recipe. Don’t worry—it’s all straightforward, and I’ll walk you through each step so nothing feels overwhelming.

Step 1: Cook the Pasta and Broccoli

• Fill a large pot with water and bring it to a boil. Add a generous pinch of salt.
• Add your pasta and cook according to the package directions for al dente texture.
• In the last minute of pasta cooking time, add the broccoli florets to the pot. This blanches the broccoli perfectly while saving you time and an extra dish.
• Drain the pasta and broccoli together and set aside.

Step 2: Sauté the Aromatics

• In a large skillet, heat olive oil or butter over medium heat.
• Add the diced onion and sauté for 3–4 minutes until soft and translucent.
• Add the mushrooms and cook for another 5–6 minutes, stirring occasionally, until they release their juices and start to brown.
• Add the garlic and cook for just 30 seconds more—just until fragrant. Don’t let it burn.

Step 3: Build the Creamy Sauce

• Sprinkle the flour over the vegetables and stir continuously for about 1 minute to cook out the raw flour taste. It will look a bit pasty, and that’s normal.
• Slowly whisk in the milk and then the chicken or vegetable stock, stirring constantly to keep the sauce smooth.
• Stir in the Dijon mustard, salt, and pepper.
• Let the sauce simmer for about 5–6 minutes, stirring occasionally, until it thickens to a silky, pourable consistency.
• Add half of the shredded cheese (about ¾ cup) and stir until melted into the sauce.

Step 4: Combine Everything

• Preheat your oven to 375°F (190°C).
• In a large mixing bowl or directly in your baking dish, combine the cooked pasta, broccoli, shredded chicken, and the creamy mushroom sauce.
• Stir well to coat everything evenly.

Step 5: Bake the Casserole

• Transfer the mixture to a greased 9×13-inch baking dish or similar-sized casserole dish.
• Bake uncovered for 15 minutes on the center rack.
• After 15 minutes, sprinkle the remaining ¾ cup cheese over the top and return to the oven.
• Bake for another 10 minutes, or until the cheese is melted and bubbly with golden edges.

Step 6: Cool Slightly and Serve

• Remove the casserole from the oven and let it sit for about 5 minutes before serving. This helps the sauce set slightly and makes scooping easier.

You can garnish with a little extra cracked black pepper, a sprinkle of paprika for color, or fresh parsley for brightness.

How to Serve this chicken broccoli pasta

Once your chicken broccoli pasta is out of the oven, bubbling and golden, you’ve got a cozy, satisfying main dish that’s ready to shine. But the beauty of a casserole like this is that you can dress it up or down, depending on the occasion. Whether it’s a quiet dinner at home, a potluck contribution, or a meal to drop off for a friend, this dish adapts to the moment.

Casual Weeknight Dinner

For a simple weeknight meal, serve generous scoops of the pasta bake in shallow bowls. The creamy sauce and tender pasta are filling enough on their own, but pairing it with a fresh side adds brightness and balance. A crisp green salad with a lemony vinaigrette or a tangy slaw works beautifully.

Family-Style Serving

Place the baking dish right in the center of the table with a big serving spoon, and let everyone dig in. This encourages second helpings (which, trust me, will happen), and makes for a warm, communal dinner vibe.

Garnish Options

While this dish doesn’t need anything extra, a few finishing touches can elevate the presentation:

• A sprinkle of freshly chopped parsley or basil adds a pop of color and freshness.
• A dash of paprika gives the top a hint of smoky warmth and a pretty finish.
• A little extra cracked black pepper right before serving enhances the aroma and brings out the cheddar’s sharpness.

For Kids and Picky Eaters

Serve it with a side of buttered peas, corn, or even soft rolls. You can also chop the broccoli a little finer or mash it lightly into the sauce if you’re working with broccoli skeptics.

For Guests or Gatherings

If you’re hosting, this chicken broccoli pasta dish pairs well with a full spread. Add garlic bread, roasted vegetables, and a side of couscous or rice if you want to extend the meal. It also reheats well, so you can make it ahead and just pop it in the oven when guests arrive.

Pairing Suggestions

This creamy chicken broccoli pasta is rich, savory, and comforting. When you’re planning what to serve alongside it—or what to sip with it—aim for elements that balance its richness and enhance the earthy flavors from the mushrooms and cheese. Here are a few pairings that work beautifully.

Fresh, crisp salads are always a win with baked pasta. The creamy texture of the dish is complemented by a bright, acidic side. Try a simple arugula salad with lemon vinaigrette, or a chopped salad with cherry tomatoes, cucumbers, red onions, and a light olive oil dressing. The crunch and freshness of a salad contrast nicely with the softness of the pasta.

Roasted vegetables are another fantastic choice. Think roasted carrots, zucchini, cauliflower, or bell peppers. Their caramelized edges and slightly sweet notes play well with the sharpness of the cheddar and the earthiness of the mushrooms. Plus, roasting veggies adds a touch of smokiness that adds depth to the overall meal.

If you want to keep things cozy, serve this casserole with a slice of warm, crusty bread or garlic toast. That way, you can soak up every bit of the creamy sauce. Alternatively, soft dinner rolls make a kid-friendly and satisfying addition to the table.

Soup and pasta might seem like a lot, but a small cup of broth-based soup can work well as a light starter. A clear chicken or vegetable soup with herbs is a gentle, warming way to start the meal without overshadowing the main dish.

In terms of drinks, opt for something refreshing. A sparkling lemonade or cucumber-infused water balances the richness of the cheese. If you’re serving adults, try a chilled sparkling juice like apple or pomegranate for a non-alcoholic option with a festive touch. If you’d like something warm, a mint tea or chamomile pairs surprisingly well and soothes the palate.

Serving this dish as part of a balanced, flavorful meal doesn’t require a lot of effort—just a little thoughtfulness. And when everything on the plate works in harmony, it elevates even the most comforting of casseroles into something truly memorable.

Storage, Freezing & Reheating Instructions

One of the reasons this chicken broccoli pasta dish is such a hit in our house is that it stores and reheats like a dream. Whether you’re making it ahead for a busy weeknight or storing leftovers for lunch, it’s super easy to manage. Let’s go through how to keep it fresh and delicious.

To store in the refrigerator, let the casserole cool completely before covering it tightly with foil or transferring individual portions to airtight containers. It will keep well in the fridge for up to three days. Because the sauce is creamy, it does firm up a little once chilled, but a quick reheat will bring it back to life.

When you’re ready to reheat from the fridge, there are a couple of methods that work well. For individual portions, use the microwave. Place the serving in a microwave-safe dish, cover with a microwave-safe lid or plate, and heat on medium power for 1–2 minutes at a time until warmed through. Add a splash of milk or broth if it seems a little dry.

For larger portions or the entire dish, reheat in the oven. Preheat your oven to 350°F, cover the casserole with foil to retain moisture, and bake for 15–20 minutes until heated through. If you want the cheese on top to get bubbly again, remove the foil in the last five minutes of baking.

To freeze, you can either freeze the entire assembled (but unbaked) casserole or freeze individual cooked portions. If you’re freezing it before baking, wrap the whole dish tightly in two layers of foil or plastic wrap and label it with the date. It will keep for up to 3 months. When ready to bake, let it thaw in the fridge overnight and then bake as directed, adding an extra 10–15 minutes if it’s still a bit cold in the center.

If you’re freezing cooked leftovers, portion them out into individual airtight containers. This is great for grab-and-go lunches or easy solo dinners. To reheat from frozen, thaw in the fridge overnight and then follow the microwave or oven instructions above.

With a little planning, you can turn this single dish into multiple meals that are just as good the second—or third—time around.

Common Mistakes to Avoid

Even though this chicken broccoli pasta recipe is pretty forgiving, there are a few common mistakes that can sneak in and affect the final outcome. But no worries—knowing what to watch for makes all the difference.

Overcooking the pasta is one of the biggest mistakes. Since the pasta will bake in the oven after being boiled, it’s important to cook it only until al dente. If it’s too soft going in, it’ll turn mushy in the bake. Keep a close eye on it while boiling, and remember to set a timer.

Using watery broccoli can also cause problems. If you’re using frozen broccoli, make sure to thaw and drain it well. Excess water from the broccoli can water down the sauce and make the bake less creamy. Give it a quick pat with paper towels after defrosting to be safe.

Another common issue is under-seasoning the sauce. Because the pasta and chicken are mild on their own, the sauce carries most of the flavor. Make sure to taste and adjust the seasoning before assembling the casserole. A bit of salt, pepper, and even an extra teaspoon of Dijon mustard can make a huge difference.

Don’t skip the flour when making the sauce. It might seem like a small step, but the flour is what helps thicken the sauce and gives it that luscious texture. Without it, your sauce might be too thin and won’t cling to the pasta properly.

And finally, don’t forget to let the casserole rest after baking. It’s tempting to dig in right away, but letting it sit for about five minutes helps the sauce settle and makes it easier to serve. It also keeps the flavors from running all over the plate.

By avoiding these common pitfalls, you’ll end up with a pasta bake that’s creamy, flavorful, and just the right texture every single time.

Pro Tips of this chicken broccoli pasta

Sometimes it’s the little things that take a recipe from good to absolutely unforgettable. These tips will help you master this dish like a pro and customize it to suit your taste and kitchen routine.

Use freshly grated cheese instead of pre-shredded. Pre-shredded cheese often contains anti-caking agents that prevent it from melting smoothly. Grating your own cheddar makes the sauce silkier and helps it bind better to the pasta.

Drain your broccoli thoroughly. Especially if using frozen, make sure all excess water is removed. Even a little leftover moisture can dilute your sauce and leave the bake a bit soggy.

Add extra veggies if you want. This recipe is very flexible—throw in a handful of spinach, diced red peppers, or even shredded carrots. It’s a great way to use up leftovers and sneak more nutrition into the dish.

If you’re short on time, make the sauce and prep the mix in the morning. Store everything in the fridge and bake it when you get home. You’ll have a homemade dinner with very little effort at the end of the day.

Want a little crunch? Mix some breadcrumbs with a drizzle of olive oil and sprinkle over the top before the final bake. It adds a toasty, golden crust that gives the dish an extra layer of texture.

For a lighter option, swap out half the cheese for a lower-fat variety or use Greek yogurt to replace some of the milk. The flavor stays rich, but with fewer calories.

Try roasting the mushrooms before adding them to the sauce. This draws out their earthy flavor even more and adds a slightly smoky dimension to the whole dish.

With these tips in your back pocket, you’ll be able to customize this pasta bake to perfection—whether you’re cooking for picky eaters, health-conscious friends, or just craving something extra special.

Frequently Asked Questions (FAQs)

Can I use frozen broccoli instead of fresh?
Yes, frozen broccoli works just fine. Be sure to thaw and drain it thoroughly before adding it to the pasta. This prevents extra moisture from thinning out your sauce.

What type of pasta works best?
Short pasta shapes like penne, rotini, fusilli, or elbows are all excellent choices. Their ridges and curves hold the sauce nicely and create a satisfying texture. Feel free to use whole wheat or gluten-free varieties if needed.

Can I make this ahead of time?
Absolutely. You can assemble the casserole a day in advance, cover it tightly, and refrigerate until ready to bake. When baking straight from the fridge, add 10–15 minutes to the baking time to ensure it heats all the way through.

How do I reheat leftovers without drying them out?
For the best results, reheat in the oven covered with foil at 350°F until warmed through. You can also reheat individual portions in the microwave with a splash of milk or broth to keep it creamy.

Is this chicken broccoli pasta recipe freezer-friendly?
Yes, it freezes beautifully. Freeze the fully cooked casserole or individual portions in airtight containers. Thaw overnight in the fridge and reheat as needed.

What if I don’t have Dijon mustard?
You can substitute a little yellow mustard or leave it out entirely, though Dijon adds a subtle tang that really enhances the flavor of the sauce.

Can I make it vegetarian?
Definitely. Just omit the chicken and use vegetable broth instead of chicken stock. You could also add chickpeas, white beans, or extra mushrooms for a protein boost.

What cheese alternatives work here?
Sharp cheddar is ideal for flavor, but you can mix it with mozzarella, Monterey Jack, or even a bit of Parmesan for variation. Use whatever combination you enjoy.

Can I add spice to the dish?
Sure! Add red pepper flakes to the sauce for a little kick, or stir in a spoonful of your favorite chili sauce. Just be mindful if you’re serving it to kids or spice-sensitive guests.

Why is my sauce too thick or too thin?
If your sauce is too thick, add a splash of milk or broth to loosen it. If it’s too thin, simmer it a bit longer or add a little more cheese to help it thicken. Just be sure to taste and adjust as you go.

Conclusion & Call to Action

There’s a certain kind of joy that comes from baking something warm and comforting for the people you love. This creamy chicken broccoli pasta bake isn’t just about filling bellies—it’s about creating moments around the table. Whether you’re serving it for a cozy weeknight dinner or prepping it for the week ahead, it’s the kind of dish that brings smiles, second helpings, and maybe even requests for the recipe.

It’s flexible, forgiving, and endlessly customizable. Got leftover chicken? Toss it in. Need a meatless Monday option? Skip the chicken and load up on veggies. Want a little spice? Add those red pepper flakes. However you make it your own, this dish is bound to earn a permanent spot in your recipe rotation.

If you try this recipe, I’d love to hear how it turned out for you. Share your tweaks, your favorite add-ins, or even who you shared it with. Post a photo and tag me—I always love seeing your creations and how these recipes come to life in your kitchen.

Now go preheat that oven and get ready to dig into the coziest casserole ever. You’ve got this.

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