Cheesy Garlic Chicken Rigatoni

The first time I made this casserole, my husband walked through the door just as I was pulling it from the oven. The smell of garlic and bubbling cheese stopped him in his tracks, and he actually said, please tell me that is for dinner right now. It has been in our regular rotation ever since, especially on those nights when everyone needs something warm and filling.

Last winter, my sister came over after a particularly rough week at work. I put this casserole in the oven while we sat at the counter talking, and watching her face light up when those first cheesy bubbles hit the table reminded me why comfort food exists. Sometimes food really is love in a baking dish.

Ingredients

• Rigatoni pasta (400 g / 14 oz): Those ridges are designed to grab onto sauce, which makes every bite extra creamy
• Boneless skinless chicken breasts (500 g / 1.1 lbs): Diced into bite sized pieces so they cook quickly and distribute evenly throughout
• Salt (1 tsp) and black pepper (½ tsp): Simple seasonings that make the chicken taste like something
• Olive oil (1 tbsp): For getting a nice golden sear on the chicken
• Unsalted butter (3 tbsp): The foundation of your roux and all that creamy goodness
• Garlic cloves (4), minced: Fresh garlic makes a huge difference here, do not even think about using the jarred stuff
• All purpose flour (3 tbsp): This thickens your sauce into something velvety and luscious
• Whole milk (2 cups / 480 ml): Whole milk creates the richest sauce, though you can get away with 2 percent
• Chicken broth (1 cup / 240 ml): Adds savory depth that milk alone cannot provide
• Italian seasoning (1 tsp): A shortcut blend that usually includes oregano, basil, and thyme
• Crushed red pepper flakes (½ tsp): Optional, but that tiny hum of heat makes everything taste brighter
• Shredded mozzarella cheese (1 cup + ½ cup / 150 g total): One cup melts into the sauce, the rest creates that golden crust
• Shredded sharp cheddar cheese (1 cup / 100 g): Sharp cheddar brings that tangy punch that cuts through the richness
• Grated Parmesan cheese (½ cup / 50 g): Adds a salty, nutty layer that makes the sauce taste restaurant quality
• Fresh parsley (2 tbsp), chopped: A bright finish that cuts through all that cheese

Instructions

Preheat your oven:

Set it to 375°F (190°C) and grease a 9x13 inch baking dish with butter or cooking spray.

Cook the rigatoni:

Boil the pasta in salted water until al dente, usually a minute or two less than the package says since it will cook more in the oven.

Sear the chicken:

Season the diced chicken with salt and pepper, then cook it in olive oil over medium high heat until golden and cooked through, about 5 to 7 minutes.

Build the roux:

In the same skillet, melt butter and cook the minced garlic for about a minute until fragrant, then whisk in the flour and let it cook for 1 to 2 minutes to get rid of that raw flour taste.

Create the sauce:

Slowly whisk in the milk and chicken broth, keeping the heat at medium and stirring constantly until the mixture smooths out and thickens, about 3 to 5 minutes.

Add the seasonings:

Stir in the Italian seasoning and red pepper flakes if you are using them, then remove the pan from the heat.

Melt in the cheeses:

Stir in the mozzarella, cheddar, and Parmesan until the sauce is smooth and creamy and you are tempted to eat it with a spoon.

Combine everything:

Add the cooked chicken and rigatoni to the sauce, mixing until every piece of pasta is coated in that garlicky cheese sauce.

Assemble the casserole:

Transfer the mixture to your prepared baking dish and sprinkle the remaining mozzarella cheese over the top.

Bake until bubbly:

Bake for 20 to 25 minutes until the cheese on top is golden brown and the sauce is bubbling up the sides.

Rest and serve:

Let the casserole sit for 5 minutes before serving, which gives it time to set so portions hold together better on the plate.

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My friend Sarah asked for this recipe after she came over for dinner last month. She texted me the next day saying her kids requested it again, and apparently her five year old told her it was better than mac and cheese. Coming from a five year old, that feels like the highest possible compliment.

Make It Faster

Some nights you just need dinner on the table quickly. A rotisserie chicken from the grocery store works beautifully here, and it actually adds a nice depth of flavor since the meat is already seasoned. Just skip the chicken cooking step and shred the rotisserie meat into bite sized pieces before tossing it with the sauce.

Customize Your Casserole

Think of this recipe as a template rather than a strict set of rules. I have added sautéed mushrooms when my husband was not looking, and spinach works beautifully if you want something green in there. Roasted red peppers add a sweet note that balances all that garlic, and sometimes I throw in frozen peas during the last minute of pasta cooking time.

What To Serve With It

This casserole is rich enough to stand on its own, but a crisp green salad with an acidic vinaigrette cuts through the cheese beautifully. Garlic bread might feel like overkill, but nobody in my house has ever complained about extra carbs.

• Try a simple arugula salad with lemon juice and olive oil
• Roasted broccoli or asparagus adds some color to the plate
• Crusty bread is never a bad idea, even if it feels indulgent

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This recipe has saved more weeknight dinners than I can count, and somehow it feels special enough for company too. That rare combination is exactly why it has earned a permanent spot in my recipe box.

Recipe FAQs

→ Can I use rotisserie chicken instead of raw chicken breasts?

Absolutely. Using shredded rotisserie chicken reduces prep time significantly. Simply skip the chicken cooking step and add about 3 cups of shredded rotisserie chicken when combining the pasta and sauce.

→ Can I make this ahead of time?

Yes. Assemble the entire casserole, cover tightly, and refrigerate for up to 24 hours before baking. You may need to add 5-10 minutes to the baking time since it will be cold.

→ Can I freeze this casserole?

You can freeze it before baking. Wrap the prepared dish tightly in plastic wrap and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.

→ What can I use instead of rigatoni?

Penne, ziti, or fusilli work beautifully. Any pasta that holds sauce well will be delicious in this dish. Just adjust the cooking time according to the package directions.

→ How do I prevent the sauce from curdling?

Temper the milk by warming it slightly before adding to the roux. Whisk continuously and avoid high heat. Adding the cheeses off the heat also helps ensure a smooth, creamy sauce.

→ Can I add vegetables to this dish?

Certainly. Sautéed mushrooms, spinach, or roasted red peppers make excellent additions. Add them when you combine the chicken, pasta, and sauce before baking.