The origins of Alfredo sauce trace back to Rome, where the simple combination of butter and Parmesan cheese was perfected to create a luxurious coating for pasta. While the traditional Italian version relies on the emulsion of pasta water and cheese, the American evolution added cream to ensure a consistent, velvety texture that holds up beautifully in a baking dish.
Turning a classic pasta dish into a baked chicken alfredo pasta casserole reflects the cultural love for comfort bakes. By introducing 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces, the meal transforms from a light dinner into a hearty, sustaining feast. The addition of a roux made with ¼ cup all-purpose flour allows the sauce to maintain its richness even after spending time in the oven.
This style of cooking is all about the intersection of Italian inspiration and home-style convenience. The layering of flavors—from the 1 teaspoon Italian seasoning to the salty punch of the cheeses—creates a depth that only happens when ingredients are allowed to mingle and bubble together under heat. It is a dish that celebrates abundance and the quiet joy of a shared family table.
Why You'll Love It
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- Honestly, there is something so grounding about a bubbly casserole coming out of the oven on a chilly evening. It just feels like a hug in a baking dish.
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- That homemade sauce is just... wow. Using 1 cup heavy cream and 1 cup whole milk makes it so velvety, reminding me of the Sunday dinners I used to make for my kids.
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- I love how the 2 cups shredded mozzarella creates that golden, stretchy crust on top. It's that little bit of indulgence that makes a weeknight feel special.
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- Well, look, it's just a crowd-pleaser. Between the tender chicken breast and the al dente penne pasta, nobody ever leaves the table hungry.
"It's the only recipe my picky teenagers agree on. Honestly, the cheesiest, most comforting pasta I've ever made!"
Essential Ingredient Guide
- 2 pounds boneless skinless chicken breast: I like to cut these into 1½ inch pieces so they cook evenly. Just be careful not to overdo it in the skillet; they'll finish softening up in the oven.
- 12 ounces penne pasta: Make sure you cook these until they are just al dente. If you overcook them now, they'll get a bit too soft after they bake in all that lovely sauce.
- 1 cup chopped fresh spinach: This is optional, but I find it adds a lovely pop of color. It's a gentle way to sneak in some greens without changing that creamy flavor we all love.
- 1 teaspoon Italian seasoning: I add this right when searing the chicken. It brings a warm, earthy fragrance to the kitchen that just tells everyone dinner is almost ready.
- 1 cup grated Parmesan cheese: This is what gives the sauce its salty, nutty depth. Stir it in slowly over low heat so it melts in perfectly smooth.
- 3 tablespoons unsalted butter: Butter is the heart of my roux. It gives the sauce a rich, silky base that carries the garlic flavor beautifully.
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A comforting baked dish that brings pizza night flavors together in one easy casserole.
Complete Cooking Process
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Getting Everything Ready:
I always start by prepping my 4 cloves garlic, minced and my chicken pieces. Having your 1 cup heavy cream and 1 cup whole milk measured out makes the sauce part so much smoother.
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Building the Flavor:
The magic happens in the skillet. Searing the chicken and then sautéing the garlic in that same pan captures all those golden bits of flavor.
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Perfecting the Texture:
Whisking the ¼ cup all-purpose flour into the butter creates a roux, which is the secret to a thick, creamy sauce. If it feels too heavy, a splash of reserved pasta water does the trick.
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The Final Layer:
Folding in the 2 cups shredded mozzarella (half inside, half on top) is key. It ensures every bite of penne pasta is cheesy, while the top gets that beautiful brown crust.
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The Perfect Rest:
I know it's tempting to dive in, but let it rest for 5 minutes. It lets the sauce set just a bit so it doesn't run all over the plate.
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Sauté the chicken until just cooked through so it stays juicy while baking.
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Add 1 tablespoon of cream cheese to the sauce for an extra touch of creaminess.
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Broil for 1-2 minutes at the very end if you like a crispier, golden top.
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Reserve ½ cup of pasta water to thin out your sauce if it thickens too much.
Pro Tips
You've got this, just trust your instincts and enjoy the process!
Warm Meals
Beef Ragu Pasta Recipe in Tomato Sauce
A rich and hearty pasta dish with slow-cooked beef ragu in a savory tomato sauce.
Better For You Treats
I mean, it's a rich dish, but it's packed with protein from the 2 pounds boneless skinless chicken breast. If you're feeling mindful, you can use low-fat mozzarella or just stir in that 1 cup chopped fresh spinach for some extra nutrients.
Ways to Make it Your Own
You could try a Shrimp & Spinach Alfredo Bake by swapping the chicken for ½ lb of shrimp. Or, if you're cooking for vegetarians, omit the meat and add diced broccoli, sliced mushrooms, and frozen peas instead.
Serving Suggestions
I love serving this with warm garlic bread and a crisp green salad with lemon vinaigrette to cut through the richness. For something fancy, a drizzle of truffle oil on top really elevates the whole meal.
Frequently Asked Questions
→ Can I use a different kind of pasta?
Yeah, you certainly can! I find 12 ounces penne pasta works best because the tubes hold the sauce, but fusilli or rigatoni are lovely too.
→ My sauce is too thick, what should I do?
Oops, that happens! Just stir in a little bit of that reserved pasta water a tablespoon at a time until it's just how you like it.
→ How do I keep the chicken from getting dry?
The trick is to only sear the chicken until it's just cooked through. It finishes softening up in the oven, which keeps it tender.
Nutrition Facts
per serving
490
Calories
26g
Protein
42g
Carbs
28g
Fat
Taste Profile
Rich, creamy, and savory with a deep cheesy depth.
Ingredient Substitutions
Don't have an ingredient? Try these alternatives
Will be slightly less rich, but still very creamy.
Any short pasta works well for casseroles.
Provides a saltier, sharper flavor profile.
Recipe Variations
Try these delicious twists on the original
Shrimp & Spinach Alfredo Bake
A lighter, seafood-inspired twist. Replace the chicken with ½ lb of peeled and deveined shrimp, sautéed until pink, and fold in 1 cup of fresh spinach into the sauce before baking.
Vegetarian Alfredo Casserole
A hearty plant-based version. Omit the chicken and instead add 1 cup of diced broccoli, 1 cup of sliced mushrooms, and 1 cup of frozen peas, cooking them until tender before mixing.
Common Mistakes to Avoid
Learn from others' mistakes for perfect results
- Overcooking the pasta during the boil, which makes it mushy after baking.
- Adding the milk too quickly to the roux, causing lumps in the sauce.
- Overcooking the chicken in the skillet, leading to dryness after the oven step.
Meal Prep & Storage
Make Ahead Tips
You can assemble the casserole up to 24 hours in advance. Just keep it covered in the fridge and add 5-10 minutes to the baking time if cooking from cold.
Leftover Ideas
Store in an airtight container in the fridge for 4 days. Reheat in the oven at 350°F, covered with foil, for about 25 minutes or until heated through.
Perfect Pairings
Serve this with...
Cooking Timeline
Preheat oven and boil salted water for the pasta.
Cook pasta al dente and sear the chicken pieces.
Prepare the roux and whisk in cream, milk, and Parmesan.
Fold pasta, chicken, and mozzarella together; transfer to dish.
Bake until golden and let rest for 5 minutes.
Baked Chicken Alfredo Pasta Casserole
A cozy embrace of a meal featuring bubbly mozzarella and a rich, velvety sauce. This baked chicken alfredo pasta casserole is the kind of dinner that fills the whole house with the scent of garlic and melted cheese.
Timing
Prep Time
20 Minutes
Cook Time
35 Minutes
Total Time
55 Minutes
Recipe Details
Ingredients
Pasta and Protein
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01
12 ounces penne pasta
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02
2 pounds boneless skinless chicken breast, cut into 1½ inch pieces
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03
1 tablespoon olive oil
Alfredo Sauce
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01
3 tablespoons unsalted butter
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02
4 cloves garlic, minced
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03
¼ cup all-purpose flour
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04
1 cup heavy cream
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05
1 cup whole milk
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06
1 cup grated Parmesan cheese
Seasoning and Topping
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01
1 teaspoon Italian seasoning
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02
1 teaspoon salt
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03
½ teaspoon freshly ground black pepper
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04
2 cups shredded mozzarella cheese
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05
2 tablespoons chopped fresh parsley (plus extra for garnish)
Optional
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01
1 cup chopped fresh spinach
Instructions
Start by preheating your oven to 375°F (190°C). It's always nice to have it warm and ready before you start the real work.
Bring a large pot of salted water to a rolling boil. Cook the 12 ounces penne pasta according to what the package says until it's al dente. Now, here is the trick: drain it, but please, save ½ cup of that starchy pasta water. You might need it later to smooth things out.
While the pasta is doing its thing, heat 1 tablespoon olive oil in a medium skillet over medium-high heat. Toss in your chicken pieces and season them with salt, pepper, and Italian seasoning. Sear them until they're a lovely golden brown on all sides and cooked through, which usually takes about 6–8 minutes. Once they're done, just move them to a plate and set them aside.
In that same skillet—because those brown bits are where the flavor is—melt the 3 tablespoons unsalted butter over medium heat. Stir in the 4 cloves garlic, minced, and let it sáuté for just about 30 seconds until it smells wonderful.
Stir in the ¼ cup all-purpose flour and whisk it together to make a roux. Let that cook for about 1 minute. Then, gradually pour in the 1 cup heavy cream and 1 cup whole milk. Keep whisking constantly so you don't get any lumps; we want this silky smooth. Let it simmer for 3–4 minutes until it thickens up nicely.
Turn the heat down to low and stir in the 1 cup grated Parmesan cheese until it's completely melted and smooth. Give it a taste—honestly, this is the most important part—and add a bit more salt or pepper if it needs it. If the sauce feels too thick, just add a splash of that reserved pasta water.
In a mixing bowl, gently fold together your cooked penne, the golden sautéed chicken, and half of the 2 cups shredded mozzarella cheese. Stir it until everything is well coated in that creamy sauce. Now, transfer the whole mixture into your 3-quart baking dish and spread it out evenly.
Top the casserole with the remaining mozzarella and sprinkle on those 2 tablespoons chopped fresh parsley for a bit of brightness.
Bake it uncovered for 20–25 minutes. You're looking for that topping to be golden brown and the sauce to be bubbling around the edges.
Take it out of the oven and, though it's hard to wait, let it rest for 5 minutes. Serve it hot, and if you like, add 1 cup chopped fresh spinach on top for a bit of color. Garnish with extra parsley if you're feeling fancy.
Notes & Tips
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1
Don't forget to save the pasta water; it's a lifesaver if the sauce gets too thick.
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2
Searing the chicken first ensures it has a deep flavor that doesn't get lost in the cream.
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3
Letting the casserole rest for a few minutes helps the sauce set so it isn't too runny when served.
Tools You'll Need
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Large pot for boiling the penne pasta
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Medium skillet for searing chicken and making the roux
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3-quart baking dish for the final bake
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Whisk to ensure the sauce stays lump-free
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Sauce bowl or mixing bowl for combining ingredients
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Measuring cups and spoons for precision
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Knife and cutting board for the garlic and chicken
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Oven mitts to handle the hot dish
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Plastic wrap or cover for storage
Must-Know Tips
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Avoid overcooking chicken, It will finish baking in the casserole, preventing dryness.
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Whisk constantly, Gradually adding liquids to the roux prevents lumps.
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Broil for a crispier top, Use the broiler for 1-2 minutes at the end for extra golden cheese.
Professional Secrets
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The Roux Method: Using a flour and butter base creates a stable, creamy emulsion that won't separate.
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Fond Utilization: Sautéing the garlic in the same pan as the chicken captures the caramelized proteins.
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Cream Cheese Hack: Adding a tablespoon of cream cheese can elevate the richness and stability of the sauce.
What readers are saying
Community reviews from home cooks like you
This was a hit with my family. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Perfect as written.
This exceeded my expectations. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Perfect as written.
Can't believe how simple this was. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Saving this for later.
So easy and delicious. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Highly recommend giving it a try.
I wanted to love this dish, but it didn't quite work for me. It took slightly longer than the recipe said. I think with some tweaks it could be really good.
Can't believe how simple this was. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. My oven needed an extra 5 minutes. Great addition to my recipe rotation.
So easy and delicious. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Already shared it with a friend.
My new favorite way to make Baked Chicken Alfredo Pasta Casserole. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Saving this for later.
So easy and delicious. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Highly recommend giving it a try.
The flavors were spot on. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Already shared it with a friend.
I wanted to love this dish, but it didn't quite work for me. It took slightly longer than the recipe said. I think with some tweaks it could be really good.
Perfect for a busy weeknight. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Already shared it with a friend.
This exceeded my expectations. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. My kids even asked for seconds.
My new favorite way to make Baked Chicken Alfredo Pasta Casserole. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Already shared it with a friend.
Good, but not amazing. The pasta flavor was nice, but my oven needed an extra 5 minutes. I might try it again with some adjustments.
Will definitely make this again. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. I swapped one ingredient and it still worked. Already shared it with a friend.
Absolutely loved this recipe! I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Will be making this regularly.
I wanted to love this dish, but it didn't quite work for me. I swapped one ingredient and it still worked. I think with some tweaks it could be really good.
So easy and delicious. I really liked how the 12 ounces penne pasta and 2 pounds boneless skinless chicken breast, cut into 1½ inch pieces came together. Thanks for sharing this one!
Recipe by
Amelia RoseAmelia cooks hearty meals 🥘🔥, sharing warmth 💛 and cozy evenings 🕯️🍲. Every dish she makes is full of love ❤️ and family laughter 👩👩👧👦🍛.
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