Chicken Pasta Bake – Cheesy, Comforting Weeknight Dinner

If weeknight dinners had a comfort-food champion, this chicken pasta bake would win every time. It’s a true dump-and-bake chicken pasta casserole: uncooked penne, shredded rotisserie chicken, jarred marinara, a splash of cream, and a handful of spinach all go straight into one 9×13 baking dish — no boiling pasta, no pre-cooking chicken, no extra pans. Fifty minutes in the oven later, you pull out a bubbling, golden, pull-apart cheesy chicken penne bake with crispy-edged mozzarella and a creamy center that tastes like you fussed for hours.

Why You’ll Love This Chicken Pasta Bake

• Dump-and-bake, no boiling — the uncooked penne bakes right in the sauce, soaking up flavor as it cooks.
• Rotisserie chicken shortcut — a store-bought rotisserie chicken means juicy, seasoned chicken with zero prep.
• One dish, easy cleanup — everything mixes and bakes in a single 9×13 pan.
• Family favorite — creamy marinara, melty mozzarella, and tender pasta: picky eaters and grown-ups all come back for seconds.
• Make-ahead friendly — assemble it the night before or freeze it for a future busy week.

Chicken Pasta Bake Ingredients

For the Pasta Bake

• 1 lb (450g) uncooked penne pasta (ziti or rigatoni also work)
• 3–4 cups shredded rotisserie chicken (about 1 small rotisserie chicken, skin removed)
• 1 jar (24 oz / 680g) marinara sauce
• 1½ cups (360ml) low-sodium chicken broth
• 1 cup (240ml) heavy cream
• 3 cups baby spinach, roughly chopped
• 1 teaspoon garlic powder
• 2 teaspoons Italian seasoning
• 1 teaspoon salt
• ½ teaspoon freshly ground black pepper
• ½ teaspoon red pepper flakes (optional, for a little kick)

For the Cheesy Top

• 2 cups (200g) shredded low-moisture mozzarella, divided
• ¾ cup (70g) freshly grated Parmesan cheese, divided
• 2 tablespoons chopped fresh basil or parsley (for serving)

How to Make Chicken Pasta Bake

Step 1: Prep the Oven and Dish

Heat the oven to 400°F (200°C). Lightly grease a 9×13-inch baking dish with butter or nonstick spray — this keeps the cheese from sticking and makes serving easier.

Step 2: Mix Everything in the Dish

Add the uncooked penne, shredded rotisserie chicken, marinara sauce, chicken broth, and heavy cream directly to the baking dish. Sprinkle in the garlic powder, Italian seasoning, salt, pepper, and red pepper flakes (if using). Stir well so every piece of pasta is coated and mostly submerged in the liquid — the pasta cooks in this liquid, so this step matters. Fold in the chopped spinach and half of the mozzarella and Parmesan.

Step 3: Bake Covered

Cover the dish tightly with aluminum foil (seal the edges so steam stays in — that’s what cooks the pasta). Bake for 35 minutes. The pasta should be just starting to soften and most of the liquid absorbed.

Step 4: Uncover and Add Cheese

Remove the foil carefully (watch for hot steam). Give the pasta a good stir — if any dry spots remain, push them under the sauce. Sprinkle the remaining mozzarella and Parmesan evenly over the top.

Step 5: Bake Until Golden and Bubbly

Return the dish to the oven uncovered and bake for 12–15 minutes more, until the cheese is melted, bubbly, and golden brown in spots. For an extra-crispy top, switch on the broiler for the final 2 minutes — but watch it closely.

Step 6: Rest and Serve

Let the bake rest for 10 minutes before serving. This sets the sauce so it scoops cleanly instead of running. Scatter fresh basil or parsley over the top and serve hot, straight from the dish.

Tips for the Best Chicken Pasta Bake

• Keep the pasta submerged. The number-one rule of dump-and-bake pasta: uncooked penne needs to sit in liquid to cook through. Stir well and press the pasta down before covering — any dry pieces poking above the sauce stay crunchy.
• Cover tightly, then uncover. Foil traps the steam that cooks the pasta in the first bake; uncovering for the last 15 minutes gives you that golden, bubbly cheese crust.
• Shred the chicken, don’t cube it. Shredded rotisserie chicken distributes evenly and stays tender; thick cubes can dry out in the oven.
• Don’t over-bake. Start checking at 12 minutes of the uncovered bake. Overbaked pasta bake goes from creamy to dry — the center should still look saucy when it comes out.
• Use freshly grated Parmesan. Pre-shredded cheese has anti-caking starch that melts less smoothly; a quick grate of real Parmesan melts into the sauce beautifully.
• Alfredo vs marinara — both work. Prefer a creamy white sauce? Swap the marinara for 2 cups of Alfredo sauce plus ½ cup more broth. For a pesto chicken pasta bake, swap in 1 cup of basil pesto plus 2 cups of marinara or crushed tomatoes.
• Add vegetables freely. The base recipe handles up to 1 cup of add-ins: sautéed mushrooms, diced bell peppers, sun-dried tomatoes, or extra spinach all fold in without changing the bake time.

What to Serve with Chicken Pasta Bake

This is a complete meal in a pan, but a fresh side makes it feel like a feast. Serve it with a crisp Caesar salad or simple green salad with vinaigrette to cut the richness, plus warm garlic bread for scooping up every last bit of sauce. A glass of red wine doesn’t hurt either. Leftovers reheat beautifully for next-day lunches.

Storage and Reheating

• Refrigerator: Store leftovers in an airtight container (or cover the baking dish tightly) for up to 4 days. The pasta absorbs sauce as it sits, so it’s even more comforting on day two.
• Freezer: Freeze the baked and cooled pasta bake for up to 3 months. Portion it into freezer-safe containers, or freeze the whole dish (cover with plastic wrap then foil). Thaw overnight in the fridge.
• Reheating: Warm individual portions in the microwave with a splash of milk or broth to loosen the sauce. For the whole dish, cover with foil and bake at 350°F (175°C) for 20–25 minutes until heated through (165°F / 74°C in the center).
• Make ahead: Assemble the bake (without the final cheese topping) up to 24 hours ahead, cover, and refrigerate. Add 10 minutes to the covered bake time since it’s starting cold, then top with cheese and finish uncovered as directed.

Chicken Pasta Bake FAQs

Can I use uncooked pasta in a chicken pasta bake?

Yes — that’s the whole point of the dump-and-bake method. The penne cooks directly in the marinara, broth, and cream. Just make sure there’s enough liquid (this recipe’s ratio is tested), keep the dish tightly covered for the first bake, and stir before adding the cheese.

Can I use leftover chicken instead of rotisserie chicken?

Absolutely. Any cooked, shredded chicken works — leftover roast chicken, poached chicken breast, even Thanksgiving turkey. You’ll need 3–4 cups. If your chicken is unseasoned, add an extra ½ teaspoon of salt and Italian seasoning.

Can I make chicken pasta bake ahead of time?

Yes. Assemble everything except the final cheese layer, cover, and refrigerate up to 24 hours. Add about 10 minutes to the covered bake time. You can also freeze the fully baked dish for up to 3 months.

How do I make a chicken alfredo pasta bake instead?

Swap the marinara sauce for 2 cups of Alfredo sauce and increase the chicken broth to 2 cups. Everything else stays the same — same method, same bake times. The result is a rich, creamy white-sauce bake.

Why did my pasta bake turn out dry?

The most common cause is not enough liquid or a loose foil cover letting steam escape. Make sure the foil is sealed tightly, don’t over-bake, and always let the bake rest 10 minutes — it looks saucier in the oven than it will after resting. Adding a splash of broth when reheating also brings back the creaminess.