Cheesy Garlic Chicken Rigatoni Casserole

My tiny apartment kitchen smelled like a Italian restaurant on Tuesday nights when this became our weeknight tradition. The way the garlic hits melted butter still makes me stop whatever I'm doing and lean over the stove.

My friend Sarah stayed over during a particularly rough winter and I threw this together with whatever was in the fridge. She texted me the next morning asking for the recipe and now it's her go to comfort food too.

Ingredients

• Rigatoni pasta: The ridges and hollow centers catch all that creamy sauce better than any other pasta shape I've tried
• Boneless chicken breasts: Dicing them into bite sized pieces means they cook fast and stay tender throughout
• Unsalted butter: Control your salt levels since the cheeses already bring plenty of seasoning
• Garlic cloves: Fresh minced garlic makes all the difference here don't even think about using the jarred stuff
• All purpose flour: This creates the roux base that thickens your sauce into something luxurious
• Whole milk: The fat content matters for a velvety sauce that coats every piece of pasta
• Chicken broth: Adds depth that plain milk can't achieve alone
• Italian seasoning: Your shortcut herb blend that saves measuring multiple dried herbs
• Crushed red pepper flakes: Optional but that tiny heat kick makes everything else pop
• Mozzarella cheddar and Parmesan: This trio gives you stretch sharpness and that salty finish
• Fresh parsley: The brightness cuts through all that rich cheese

Instructions

Get your oven ready:

Preheat to 375°F and grease a 9x13 baking dish with butter or cooking spray

Cook the rigatoni:

Boil in salted water until al dente then drain immediately to stop the cooking process

Sear the chicken:

Season with salt and pepper then cook in olive oil until golden and cooked through about 5 to 7 minutes

Build your sauce base:

Melt butter in the same skillet add garlic for 1 minute then whisk in flour

Melt in the cheeses:

Remove from heat and stir in all three cheeses until completely smooth and melted

Combine everything:

Add the cooked chicken and drained pasta to the sauce tossing until every piece is coated

Transfer to baking dish:

Spread evenly in your prepared pan and sprinkle the remaining mozzarella on top

Bake until bubbly:

Pop in the oven for 20 to 25 minutes until the cheese is golden and edges are bubbling

Finish and serve:

Let it rest 5 minutes then scatter fresh parsley on top before serving

Save

This casserole turned into my bring this dish contribution for every potluck and family gathering. Something about comfort food that serves a crowd just brings people together.

Making It Your Own

I started swapping in rotisserie chicken on busy weeks and honestly it might be even better. The meat has more flavor and saves you that whole cooking step.

Vegetable Add Ins

Sautéed mushrooms spinach or roasted red peppers fold right into the sauce before baking. They add color and make the whole thing feel a little less guilty.

Make Ahead Magic

Assemble everything through step eight then cover and refrigerate up to 24 hours. Add a few extra minutes to the baking time since it will be cold.

• Let the dish sit on the counter for 20 minutes while the oven preheats
• Cover with foil for the first 15 minutes to prevent over browning
• Check the internal temperature reaches 165°F throughout

Save

There's something deeply satisfying about pulling this bubbling golden beauty out of the oven. Enjoy every cheesy comforting bite.

Recipe FAQs

→ Can I make this ahead of time?

Yes, assemble the entire dish up to 24 hours in advance and refrigerate covered with foil. When ready to bake, add about 10 extra minutes to the baking time since it will be cold.

→ What can I use instead of rigatoni?

Penne, ziti, or rotini pasta work equally well. Even macaroni makes a great substitute. Just cook whatever pasta you choose to al dente since it will continue cooking in the oven.

→ Can I freeze this casserole?

Absolutely. Assemble the dish, wrap tightly in plastic and foil, and freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.

→ How do I know when the sauce is thick enough?

The sauce is ready when it coats the back of a spoon and leaves a clear trail when you run your finger through it. This usually takes 3-5 minutes of simmering.

→ Can I use rotisserie chicken?

Yes, shred about 3 cups of rotisserie chicken and skip steps 2 and 3. Add the shredded chicken directly when combining the pasta and sauce.

→ What vegetables can I add?

Sautéed mushrooms, spinach, broccoli florets, or roasted red peppers all complement the flavors beautifully. Add them when you combine the chicken and pasta with the sauce.