Name: Cheesy Chicken Shells — The Ultimate Creamy, Comforting Pasta Bake
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American
Ingredients: 12 ounces jumbo pasta shells; 3 cups cooked shredded chicken; 2 cups small broccoli florets; 3 tablespoons unsalted butter; 3 tablespoons all-purpose flour; 3 cloves garlic minced; 1 1/2 cups chicken broth; 1 1/2 cups heavy cream; 4 ounces cream cheese softened and cubed; 3 cups shredded mozzarella cheese divided; 1 cup freshly grated Parmesan cheese divided; 1 teaspoon Italian seasoning; 1 teaspoon onion powder; 1/2 teaspoon garlic powder; 1 teaspoon kosher salt plus more for pasta water; 1/2 teaspoon black pepper; 2 tablespoons chopped fresh parsley optional for garnish

When I’m craving serious comfort on a chilly night, this cheesy chicken shells bake is exactly what I pull from the oven. Jumbo pasta shells are stuffed with juicy shreds of chicken, nestled into tender broccoli, then smothered in a velvety garlic-Parmesan cream sauce and baked until the tops are bubbling and golden.

It’s the kind of dish that makes everyone wander into the kitchen asking, “What smells so good?” — and then go back for seconds. Whether you’re feeding a hungry family or stocking the fridge for easy heat-and-eat meals, this creamy pasta bake delivers cozy, restaurant-level comfort with simple, weeknight-friendly ingredients.

What Makes These Cheesy Chicken Shells So Good?

For me, this recipe strikes the perfect balance between indulgent and practical. It uses leftover or rotisserie chicken, so there’s very little fuss, and the whole thing can be assembled ahead of time. The broccoli tucked between the shells adds color, texture, and a bit of veg so you’re not just eating a pan of pure cheese — even if it tastes gloriously that way.

The cream sauce is rich without being heavy thanks to a mix of broth, cream, and melty mozzarella. A final shower of Parmesan on top creates those irresistible crispy-cheesy edges that everyone fights over at the table.

Ingredients for Cheesy Chicken Shells — The Ultimate Creamy, Comforting Pasta Bake

Jumbo pasta shells
These big ridged shells are the perfect pockets to hold the creamy chicken filling and sauce.

Cooked shredded chicken
Rotisserie chicken or leftover roasted chicken keeps the prep quick and adds plenty of savory flavor.

Broccoli florets
Fresh or frozen broccoli brings a pop of green, mild sweetness, and just enough crunch to balance the richness.

Butter
Used to start the roux, butter adds flavor and helps the sauce cling beautifully to the shells.

All-purpose flour
Flour thickens the cream sauce so it’s luxurious and spoonable instead of runny.

Garlic
Fresh minced garlic perfumes the pan and gives the sauce that cozy, homemade depth.

Chicken broth
Broth lightens the sauce while layering in savory, chicken-y goodness.

Heavy cream
Cream adds body and richness, turning the sauce ultra-silky.

Cream cheese
Just a little melts into the sauce for tang and extra creaminess so every bite tastes decadent.

Mozzarella cheese
Mild, melty mozzarella stretches into gorgeous strings and blankets the shells.

Parmesan cheese
Salty, nutty Parmesan gives the casserole its crispy browned top and deep cheesy flavor.

Italian seasoning
A blend of herbs that ties everything together with an easy Italian-style flavor.

Onion powder & garlic powder
These pantry spices reinforce the savory flavor without extra chopping.

Salt and black pepper
Essential for balancing all the creamy, cheesy elements.

How To Make the Cheesy Chicken Shells — The Ultimate Creamy, Comforting Pasta Bake

Step 1: Boil the shells and broccoli

Cook the jumbo pasta shells in a big pot of well-salted boiling water until just shy of al dente — they’ll continue cooking in the oven. In the last 2 minutes of cooking time, toss in the broccoli florets to blanch them bright green and crisp-tender. Drain everything well and spread the shells out on a tray so they don’t stick together.

Step 2: Prep the chicken filling

In a large bowl, combine the shredded chicken with a handful of mozzarella, a spoonful of softened cream cheese, and a pinch of Italian seasoning, garlic powder, onion powder, salt, and pepper. This mixture should be creamy and easy to spoon into the shells.

Step 3: Make the creamy garlic-Parmesan sauce

In a saucepan, melt the butter over medium heat, then stir in the flour to form a smooth paste. Cook for 1–2 minutes to cook off the raw flour taste. Add the minced garlic and cook just until fragrant. Slowly whisk in the chicken broth, followed by the heavy cream, stirring constantly until the sauce is smooth and starting to thicken. Melt in cream cheese, then stir in more mozzarella and a handful of Parmesan until glossy. Taste and adjust seasoning.

Step 4: Assemble the casserole

Lightly grease a 9×13-inch baking dish. Pour a thin layer of the cream sauce into the bottom of the dish. Arrange the broccoli florets over the sauce. Spoon the chicken mixture into each shell and nestle them, open-side up, into the pan in snug rows.

Step 5: Smother with sauce and cheese

Pour the remaining cream sauce evenly over the stuffed shells, making sure each one gets some love. Sprinkle the top generously with the remaining mozzarella and Parmesan. Add an extra pinch of Italian seasoning or black pepper if you like a speckled, herby top.

Step 6: Bake until bubbling and golden

Bake in a 350°F (175°C) oven for about 25–30 minutes, or until the casserole is bubbling around the edges and the cheese is melted and starting to brown. For deeper color, you can broil for 1–2 minutes at the end — just watch closely.

Step 7: Rest and serve

Let the cheesy chicken shells rest for about 10 minutes before serving so the sauce can thicken slightly and the shells hold together. Garnish with fresh parsley if you like a bit of color.

Serving and Storing Cheesy Chicken Shells — The Ultimate Creamy, Comforting Pasta Bake

I like to serve these shells straight from the baking dish at the center of the table, family-style. A big spoonful over a shallow bowl catches all the creamy sauce, and a simple side salad or roasted vegetables turns it into a complete meal.

Leftovers reheat beautifully, which makes this recipe ideal for meal prep. Store cooled portions in airtight containers in the fridge for up to 4 days. Reheat gently in the microwave or covered in the oven with a splash of milk or broth to loosen the sauce. You can also assemble the entire casserole a day ahead, cover tightly, and bake when you’re ready to eat — just add 5–10 extra minutes of baking time if it’s going into the oven cold.

For longer storage, wrap the unbaked, assembled casserole well and freeze for up to 2 months. Thaw overnight in the refrigerator, then bake as directed, adding a bit of extra time until hot throughout.

What to Serve With Cheesy Chicken Shells?

Garlic Bread or Breadsticks

A warm, buttery garlic bread or soft breadsticks are perfect for swiping up every last streak of creamy sauce.

Simple Green Salad

A crisp salad with mixed greens, tomatoes, cucumbers, and a tangy vinaigrette cuts through the richness and keeps the plate balanced.

Roasted Vegetables

Try roasted carrots, Brussels sprouts, or asparagus tossed with olive oil and salt — they caramelize nicely alongside the casserole.

Caesar Salad

If you’re craving something a little heartier, a classic Caesar salad with crunchy croutons and Parmesan is a natural partner for cheesy pasta.

Steamed or Sautéed Green Beans

Fresh green beans with a bit of garlic and lemon stay bright and crisp and complement the chicken and broccoli.

Caprese Salad

Slices of ripe tomato, fresh mozzarella, and basil drizzled with balsamic glaze echo the Italian flavors in the shells without adding more heaviness.

Fruit Salad or Citrus Segments

A light fruit salad or simple orange wedges offer a refreshing, sweet contrast after a rich, cheesy meal.

Want More Comforting Pasta Bake Ideas?

If these Cheesy Chicken Shells are your kind of cozy, you’ll probably fall for a few more of my bubbly, oven-baked favorites:

Try my cheesy spinach stuffed shells when you want a vegetarian option that’s still ultra-creamy and satisfying.
For a meaty twist, the creamy beef and shells recipe is loaded with saucy ground beef and tender pasta.
If you love stuffed pasta, you’ll be obsessed with the million dollar ravioli casserole — it’s rich, cheesy, and made for sharing.
And when you’re craving even more cheese, garlic Parmesan tortellini with chicken and broccoli brings all the same cozy flavors in bite-size pasta form.

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When you make it, let me know in the comments how yours turned out. Did you sneak in extra veggies? Swap the broccoli for spinach or peas? Play with the cheeses on top?

I love hearing how you make these dishes your own. Questions are always welcome too — we’re all just trying to get dinner on the table a little easier and a lot more delicious.

Explore beautifully curated, comfort-food dinners and pastas on ChefAlchemy’s recipes and discover your new go-to for feeling great — and if you’re a visual cook, follow along with even more creations by saving them from my Pinterest boards right here: more recipes on ChefAlchemy.