Follow these simple steps to create your Garlic Butter Chicken Alfredo Stuffed Shells:

1. Preheat Oven: Preheat your oven to 350°F (175°C).

2. Cook the Shells: Bring a large pot of salted water to a boil. Cook the pasta shells according to the package instructions until al dente. Drain and set aside to cool slightly.

3. Prepare the Filling: In a large bowl, combine the shredded chicken, 1 cup of the Alfredo sauce, half of the mozzarella cheese, minced garlic, salt, and pepper. Mix well until fully combined.

4. Stuff the Shells: Carefully fill each cooked pasta shell with the chicken filling. Place the stuffed shells in a greased 9×13 inch baking dish.

5. Add Sauce: Pour the remaining Alfredo sauce over the stuffed shells, ensuring they’re well-coated.

6. Top with Cheese: Sprinkle the remaining mozzarella and Parmesan cheese on top of the stuffed shells.

7. Bake: Cover the dish with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbly and golden.