Chicken Mac and Cheese

Elbow macaroni folded into a from-scratch three-cheese sauce loaded with tender shredded chicken, baked until the top turns golden and crisp.

Comfort food that doubles as a full dinner instead of just a side.

🕒
Prep Time
15 mins

🔥
Cook Time
30 mins

🍽️
Servings
6 people

Why You Love This Recipe

A genuinely complete meal. With chicken folded right into the cheese sauce, this isn't just a side — it's a full dinner in one baking dish.
Three cheeses, real depth. Cheddar, gruyère, and parmesan together give the sauce more complexity than a single-cheese version, without making it any harder to put together.
A textural contrast that matters. The crisp, buttery breadcrumb topping against the creamy pasta underneath is what makes baked mac and cheese worth the extra step over stovetop versions.
Great for using up leftover chicken. Rotisserie chicken or leftovers from another meal fold in easily, making this a smart way to turn extra chicken into a new dinner entirely.

Tools and Preparation

Essential Tools and Equipment

Large pot — for boiling the macaroni, with enough room for the pasta to cook evenly.
Large saucepan — for building the roux and cheese sauce separately from the pasta.
9x13-inch baking dish — the standard size for this volume of pasta and sauce, allowing the top to bake evenly.
Box grater — for shredding the cheeses fresh, which is essential for a smooth, non-grainy sauce.
Whisk — for building the roux and incorporating the milk smoothly without lumps.
Small bowl — for mixing the breadcrumb topping with melted butter before scattering it over the casserole.

Importance of Each Tool

A whisk is non-negotiable for this recipe's sauce — adding milk to a hot roux without constant whisking is the most common way lumps form, and once they set, they're very difficult to smooth back out.
Freshly grated cheese, rather than the pre-shredded bagged kind, makes a real difference in how smoothly the sauce melts together, since pre-shredded cheese is coated in anti-caking starch that can leave the sauce looking slightly broken or grainy.
The 9x13 baking dish matters for more than just capacity — it gives the casserole enough surface area for the breadcrumb topping to bake evenly across the top rather than staying soft in the middle of a deeper, smaller dish.

Ingredients

This serves six as a main course. The recipe scales up easily for a larger gathering using two baking dishes.

For the Pasta and Chicken:

Elbow macaroni — 1 lb
Kosher salt, for the pasta water — 2 tbsp
Cooked, shredded chicken (rotisserie or poached) — 3 cups

For the Cheese Sauce:

Unsalted butter — 4 tbsp
All-purpose flour — 4 tbsp
Whole milk, warmed — 3.5 cups
Garlic powder — 1/2 tsp
Onion powder — 1/2 tsp
Dijon mustard — 1 tsp
Shredded sharp cheddar cheese — 2 cups
Shredded gruyère cheese — 1 cup
Grated parmesan cheese — 1/2 cup
Kosher salt — 3/4 tsp, or to taste
Black pepper — 1/2 tsp

For the Breadcrumb Topping:

Panko breadcrumbs — 1 cup
Unsalted butter, melted — 3 tbsp
Grated parmesan cheese — 1/4 cup

To Finish:

Fresh parsley or chives, chopped — for garnish

Steps To Create Recipe

Cook the macaroni. Bring a large pot of generously salted water to a boil. Cook the elbow macaroni according to the package instructions until just shy of al dente, since it will continue cooking in the oven. Drain and set aside.
Build the roux. In a large saucepan, melt the butter over medium heat. Whisk in the flour and cook for 1 to 2 minutes, whisking constantly, until lightly golden and fragrant.
Add the milk gradually. Slowly pour in the warmed milk in a steady stream, whisking constantly to prevent lumps. Continue whisking until fully smooth.
Thicken the sauce. Bring the mixture to a gentle simmer, whisking occasionally, and cook for 4 to 5 minutes, until it thickens enough to coat the back of a spoon. Stir in the garlic powder, onion powder, and Dijon mustard.
Melt in the cheeses. Reduce the heat to low. Add the cheddar, gruyère, and parmesan a handful at a time, whisking until each addition melts smoothly before adding more. Season with salt and pepper.
Combine the pasta, sauce, and chicken. Preheat the oven to 375°F. In a large bowl, combine the cooked macaroni, cheese sauce, and shredded chicken, folding gently until everything is evenly coated.
Transfer to the baking dish. Spread the mixture evenly into a greased 9x13-inch baking dish.
Make the breadcrumb topping. In a small bowl, toss the panko with the melted butter and parmesan until evenly coated. Scatter the mixture evenly over the top of the casserole.
Bake until golden. Bake uncovered for 20 to 25 minutes, until the topping is deeply golden and the sauce is bubbling at the edges.
Rest and serve. Let the casserole rest for 5 to 10 minutes before serving, which helps it set slightly for cleaner portions. Garnish with chopped parsley or chives.

How to Serve

Chicken mac and cheese is rich and filling enough to stand on its own, so simple, slightly acidic sides work best alongside it.
A green salad with a sharp vinaigrette cuts through the richness nicely, and steamed or roasted vegetables, like broccoli or green beans, add some freshness and color to the plate.
For a family dinner or potluck, this casserole serves well straight from the baking dish, scooped generously into bowls.
A simple side of garlic bread is optional here, since the dish is already quite rich, but it's a welcome addition for anyone who wants to round things out further.
Good pairings: a crisp green salad, steamed broccoli, roasted green beans, sliced tomatoes, a simple coleslaw.

Common Mistakes to Avoid

Overcooking the pasta before baking. Since the macaroni continues cooking in the oven, boiling it to full al dente beforehand can lead to mushy noodles in the finished dish. Pull it slightly underdone.
Adding cold milk to the roux too quickly. Pouring in cold milk all at once, rather than warmed milk added gradually while whisking, is the most common cause of a lumpy sauce.
Using pre-shredded cheese. The anti-caking starch on packaged shredded cheese can prevent it from melting smoothly, leaving the sauce slightly grainy. Shred the cheese fresh from a block for the best texture.
Skipping the resting period before serving. Cutting into the casserole immediately after baking can cause the sauce to run thin on the plate. A short rest lets it set slightly for neater servings.
Overbaking the casserole. Extended time in the oven past what's needed to brown the topping can dry out the pasta and toughen the sauce. Watch for golden breadcrumbs and bubbling edges as your cue to pull it.
Skipping the breadcrumb topping. It's tempting to leave it off for a simpler dish, but the textural contrast it adds is a big part of what makes baked mac and cheese worth making over a stovetop version.

Storage & Reheating Instructions

Refrigerator: Store leftovers covered in the baking dish or in an airtight container for up to 4 days. The sauce will thicken further as it chills, which is normal.
Freezer: This casserole freezes well both baked and unbaked. Wrap tightly and freeze for up to 3 months; thaw overnight in the refrigerator before reheating or baking.
Reheating: Cover with foil and reheat in a 350°F oven for 20 to 25 minutes, until warmed through, removing the foil for the last few minutes to re-crisp the topping. A splash of milk stirred in before reheating helps loosen the sauce.
Baking from frozen (unbaked): Bake covered at 350°F for about 50 to 60 minutes, removing the foil for the final 15 minutes to brown the topping.

Frequently Asked Questions

Q: Can I use a different pasta shape?

A: Yes. Elbow macaroni is traditional, but shells, cavatappi, or penne all work well and hold the cheese sauce nicely.

Q: Can I use rotisserie chicken for this recipe?

A: Yes, rotisserie chicken is a convenient and popular choice. About 3 cups of shredded meat from one rotisserie chicken is roughly the right amount.

Q: Can I substitute different cheeses?

A: Yes, though the combination of cheddar, gruyère, and parmesan gives a particularly balanced flavor. Monterey Jack, fontina, or gouda can be swapped in for some or all of the gruyère if preferred.

Q: Why did my cheese sauce turn grainy?

A: This is almost always caused by pre-shredded cheese or adding the cheese over heat that's too high. Use freshly grated cheese and keep the heat at low once the cheese goes in.

Q: Can I make this ahead of time?

A: Yes. Assemble the full casserole, including the breadcrumb topping, cover tightly, and refrigerate for up to 24 hours before baking. Add a few extra minutes to the bake time since it will start from cold.

Q: Can I make this without the breadcrumb topping?

A: Yes, it's optional, though it adds valuable texture. Without it, you'll have more of a creamy stovetop-style mac and cheese baked in a casserole format.

Q: Is this dish spicy?

A: No, it's mild as written. A pinch of cayenne or a few dashes of hot sauce can be added to the cheese sauce if you'd like a little heat.

Final Thoughts

What makes this version worth the extra effort over a boxed mix is the depth that three real cheeses and a proper roux bring to the sauce, paired with a breadcrumb topping that gives every bite some crunch against the creamy pasta underneath.
Once you've got the roux and cheese-melting technique down, this becomes an easy, flexible dinner that's just as good with leftover chicken as it is freshly cooked.
This is the kind of mac and cheese that turns a simple comfort food into something worth making the centerpiece of dinner.