Chicken Alfredo Stuffed Shells are jumbo pasta shells filled with tender chicken, ricotta, spinach, mozzarella, and Parmesan, then baked in a creamy homemade garlic Alfredo sauce. The filling stays soft and cheesy while the exposed edges of the shells become lightly golden, giving the casserole a satisfying contrast of creamy and baked textures.

Chicken Alfredo Stuffed Shells finished recipe

The shells can be assembled several hours ahead and refrigerated until baking, making this a practical make-ahead dinner. A layer of Alfredo sauce underneath and over the stuffed shells keeps the pasta moist while the cheese melts into a bubbly golden topping.

Recipe at a Glance

Prep Time: 30 minutes
Cook Time: 45 minutes
Additional Time: 10 minutes
Total Time: 1 hour 25 minutes
Yield: 20 stuffed shells
Servings: 6
Difficulty: Intermediate

Why You'll Love This Recipe

Cooking the shells just until al dente keeps them firm enough to fill without tearing and prevents them from becoming overly soft during baking.
Ricotta gives the filling a creamy texture, while mozzarella and Parmesan add melt and savory flavor.
Chopped spinach adds color and freshness without introducing excessive moisture when it is squeezed dry first.
Homemade Alfredo sauce coats both the bottom and top of the shells, helping the pasta stay tender during baking.
Resting the casserole for 10 minutes after baking allows the filling and sauce to settle so the shells are easier to serve.

Equipment Needed

9 x 13-inch (23 x 33 cm) baking dish
5- to 6-quart pot
Colander
2- to 3-quart saucepan
Large mixing bowl
Whisk
Flexible spatula or wooden spoon
Fine grater
Instant-read thermometer

Ingredients You'll Need

Chicken Alfredo Stuffed Shells ingredients

For the Pasta Shells

■ 24 jumbo pasta shells, about 8 ounces (225 g), uncooked
■ 1 tablespoon fine salt, for the pasta water

For the Chicken Filling

■ 3 cups (420 g) cooked chicken, finely chopped or shredded
■ 15 ounces (425 g) whole-milk ricotta cheese
■ 1 cup (115 g) shredded low-moisture mozzarella cheese
■ 1/2 cup (45 g) finely grated Parmesan cheese
■ 1 cup (30 g) baby spinach, finely chopped
■ 1 large egg
■ 2 tablespoons (8 g) chopped fresh parsley
■ 1 teaspoon Italian seasoning
■ 1/2 teaspoon garlic powder
■ 1/2 teaspoon fine salt
■ 1/4 teaspoon ground black pepper

For the Alfredo Sauce

■ 4 tablespoons (56 g) unsalted butter
■ 4 garlic cloves, finely minced
■ 2 cups (480 ml) heavy cream
■ 1 1/2 cups (135 g) finely grated Parmesan cheese
■ 1/4 teaspoon ground black pepper
■ 1/8 teaspoon ground nutmeg

For Topping

■ 1 cup (115 g) shredded low-moisture mozzarella cheese
■ 1/4 cup (22 g) finely grated Parmesan cheese

For the Baking Dish

■ Nonstick cooking spray, for greasing

Optional Garnish

■ 2 tablespoons (8 g) chopped fresh parsley, optional

How to Make Chicken Alfredo Stuffed Shells

Preheat the Oven

Preheat the oven to 375°F (190°C). Lightly coat a 9 x 13-inch (23 x 33 cm) baking dish with nonstick cooking spray. This step ensures that the casserole does not stick to the dish, making it easier to serve once baked.

Cook the Pasta Shells

Bring a large pot of water to a rolling boil and add 1 tablespoon fine salt. Add the 24 jumbo shells and cook about 2 minutes less than the package directions, until flexible but still firmly al dente. This prevents the shells from becoming too soft during baking.

Drain and Cool the Shells

Drain the shells carefully and arrange them in a single layer on a clean baking sheet or large plate. Let them cool enough to handle. Select the 20 least-damaged shells for filling. Cooling them prevents burns and makes them easier to fill.

Prepare the Chicken Filling

In a large bowl, combine the cooked chicken, ricotta, 1 cup (115 g) mozzarella, 1/2 cup (45 g) Parmesan, spinach, egg, parsley, Italian seasoning, garlic powder, salt, and black pepper. Mixing these ingredients creates a flavorful filling that complements the pasta shells.

Check the Filling Texture

Stir until evenly combined. The mixture should be thick enough to mound on a spoon without running. If the ricotta was unusually wet, let the filling stand for a few minutes before stuffing the shells. This ensures the filling holds its shape inside the shells.

Start the Alfredo Sauce

Melt the butter in a 2- to 3-quart saucepan over medium-low heat. Add the garlic and cook for about 30 seconds, stirring constantly, until fragrant but not browned. Properly cooking the garlic enhances the flavor of the sauce without bitterness.

Add the Cream

Pour in the heavy cream and add the black pepper and nutmeg. Bring to a gentle simmer over medium-low heat and cook for 3 to 4 minutes, stirring frequently. This step helps to develop the flavors of the sauce before adding the cheese.

Add the Parmesan

Reduce the heat to low. Add the 1 1/2 cups (135 g) Parmesan gradually, whisking until smooth after each addition. The sauce should coat the back of a spoon but still pour easily. Avoid boiling the sauce after adding the cheese to prevent it from becoming grainy.

Sauce the Baking Dish

Spread about 1 1/2 cups (360 ml) of the Alfredo sauce evenly over the bottom of the prepared baking dish. This layer keeps the pasta moist during baking and adds flavor to the dish.

Fill the Shells

Spoon about 3 tablespoons of chicken filling into each of the 20 cooked shells. The shells should be generously filled but still hold their shape. Properly filling the shells ensures a balanced flavor in every bite.

Arrange the Stuffed Shells

Place the filled shells open-side up in the baking dish in a snug, even layer. This arrangement allows the sauce to cover the shells evenly, promoting even cooking.

Add the Remaining Sauce

Spoon the remaining Alfredo sauce evenly over and around the shells. Leave a few small areas of pasta exposed so they can develop lightly golden edges. This step enhances the texture and visual appeal of the dish.

Add the Cheese Topping

Sprinkle the remaining 1 cup (115 g) mozzarella and 1/4 cup (22 g) Parmesan evenly over the casserole. The cheese will melt and create a delicious, bubbly topping.

Bake Covered

Cover the baking dish loosely with aluminum foil and bake at 375°F (190°C) for 20 minutes. This helps to steam the shells and keep them moist during the initial baking period.

Brown the Top

Remove the foil and continue baking for 10 to 15 minutes, until the sauce is bubbling around the edges and the cheese is melted with lightly golden spots. This step creates a desirable texture contrast between the creamy filling and the crispy cheese topping.

Check the Temperature

Check the center of the casserole with an instant-read thermometer. Because the filling contains previously cooked chicken and egg, it should reach at least 165°F (74°C). This ensures that the dish is safe to eat.

Rest Before Serving

Remove the casserole from the oven and let it rest for 10 minutes. The sauce will thicken slightly and the shells will hold together more easily, making serving simpler.

Garnish and Serve

Sprinkle with optional chopped parsley and serve warm. This final touch adds a pop of color and freshness to the dish.

Chicken Alfredo Stuffed Shells step Final

Helpful Notes

Do not fully cook the pasta shells before stuffing them; they continue softening in the Alfredo sauce during baking.
Cook a few extra shells because jumbo shells occasionally tear while boiling or draining.

Tips for Success

Do not fully cook the pasta shells before stuffing them; they continue softening in the Alfredo sauce during baking.
Cook a few extra shells because jumbo shells occasionally tear while boiling or draining.
If the spinach is washed just before using, dry it thoroughly so it does not add excess water to the filling.
Grate Parmesan finely from a block so it melts smoothly into the Alfredo sauce.
Keep the heat low after adding Parmesan to prevent the sauce from becoming grainy or oily.
Allow the baked shells to rest for 10 minutes before serving so the filling stays inside the pasta.

Storage, Freezing, and Make-Ahead Instructions

Cool leftover Chicken Alfredo Stuffed Shells promptly and transfer them to an airtight container within 2 hours. Refrigerate for up to 4 days.

Reheat individual portions in the microwave or place the shells in a covered baking dish at 350°F (175°C). Add a small splash of milk or cream around the shells before reheating to keep the Alfredo sauce from drying out. Heat leftovers until the center reaches 165°F (74°C).

For make-ahead preparation, assemble the stuffed shells through the cheese-topping stage up to 24 hours ahead. Cover tightly and refrigerate. Bake directly from the refrigerator, adding approximately 10 minutes to the covered baking time.

The assembled casserole can also be frozen before baking. Wrap the baking dish tightly with plastic wrap and aluminum foil and freeze for up to 2 months. Thaw overnight in the refrigerator before baking. For the smoothest Alfredo texture, freezing individual cooked portions is less ideal because cream sauces can separate slightly after thawing.

FAQ

Can I make Chicken Alfredo Stuffed Shells ahead of time?

Yes. Assemble the entire casserole up to 24 hours ahead, cover it tightly, and refrigerate. When ready to cook, bake it directly from the refrigerator and allow about 10 additional minutes during the covered portion of baking.

Can I use rotisserie chicken?

Yes. Rotisserie chicken works very well. Remove the skin and bones, then finely chop or shred 3 cups (420 g) of meat for the filling.

Why is my Alfredo sauce grainy?

The sauce was likely too hot when the Parmesan was added. Keep the heat low and add finely grated Parmesan gradually while whisking. Avoid boiling the sauce once the cheese has been added.

Can I use frozen spinach?

Yes. Thaw frozen chopped spinach completely and squeeze out as much liquid as possible before measuring 1 cup (about 150 g packed and well-drained). Excess moisture can make the filling watery.

Can I add broccoli?

Yes. Fold up to 1 cup (90 g) of finely chopped, lightly steamed broccoli into the filling. Cool and drain it thoroughly first so it does not release extra moisture into the shells.