Creamy Garlic Mushroom Stuffed Shells Recipe

The smell of mushrooms sizzling in butter and garlic is enough to bring everyone into the kitchen before the casserole even reaches the oven. This Creamy Garlic Mushroom Stuffed Shells recipe fills tender pasta shells with a savory mushroom-and-ricotta mixture, then covers them in a smooth garlic cream sauce and plenty of bubbling cheese.

It is cozy, rich, and satisfying without requiring complicated ingredients. Serve it for Sunday dinner, a meatless family meal, or any evening that calls for something warm from the oven.

Why You’ll Love This Recipe

• Rich, savory filling: Finely chopped mushrooms, garlic, ricotta, mozzarella, and Parmesan fill every shell.
• Homemade creamy sauce: The simple garlic sauce comes together in one skillet without canned soup.
• Easy to prepare ahead: Assemble the entire dish earlier in the day and bake it before dinner.
• Comfort food without meat: The mushrooms give the filling a hearty texture and deep flavor.

Recipe Card Summary

• Prep Time: 30 minutes
• Cook Time: 35 minutes
• Total Time: 1 hour 5 minutes
• Servings: 6
• Yield: 20 stuffed shells
• Category: Dinner
• Method: Baking
• Cuisine: Italian-Inspired
• Recipe Style: Comfort Food

Creamy Garlic Mushroom Stuffed Shells Recipe Ingredients

For the Pasta

• 20 jumbo pasta shells
• 1 tablespoon salt, for the pasta water

For the Mushroom Filling

• 2 tablespoons unsalted butter
• 1 tablespoon olive oil
• 16 ounces cremini or white mushrooms, finely chopped
• 1 small yellow onion, finely diced
• 3 garlic cloves, minced
• 1 teaspoon Italian seasoning
• ½ teaspoon salt
• ¼ teaspoon ground black pepper
• 1 container (15 ounces) whole-milk ricotta cheese
• 1 cup shredded mozzarella cheese
• ½ cup grated Parmesan cheese
• 1 large egg
• 2 tablespoons chopped fresh parsley

For the Garlic Cream Sauce

• 3 tablespoons unsalted butter
• 4 garlic cloves, minced
• 3 tablespoons all-purpose flour
• 2 cups whole milk
• ½ cup heavy cream
• ½ teaspoon salt
• ¼ teaspoon ground black pepper
• ¼ teaspoon ground nutmeg, optional
• ½ cup grated Parmesan cheese

For the Topping

• 1 cup shredded mozzarella cheese
• ¼ cup grated Parmesan cheese
• 1 tablespoon chopped fresh parsley, optional

How to Make Creamy Garlic Mushroom Stuffed Shells

1. Prepare the baking dish.
   Preheat the oven to 375°F. Lightly grease a 9-by-13-inch baking dish with butter or nonstick cooking spray.
2. Cook the pasta shells.
   Bring a large pot of water to a boil and add the salt. Cook the jumbo shells for about 2 minutes less than the package directions recommend.The shells should be flexible but still slightly firm. They will continue cooking in the oven.
3. Cool the shells.
   Drain the pasta carefully, then arrange the shells in a single layer on a lightly oiled baking sheet. This prevents them from sticking together while you prepare the filling.
4. Cook the mushrooms.
   Melt 2 tablespoons of butter with the olive oil in a large skillet over medium-high heat. Add the chopped mushrooms and onion.Cook for 8 to 10 minutes, stirring occasionally. The mushrooms will first release moisture; keep cooking until that liquid evaporates and the edges begin to brown.
5. Season the filling.
   Add the garlic, Italian seasoning, salt, and black pepper. Cook for 30 seconds, stirring constantly, until the garlic smells fragrant.Remove the skillet from the heat and let the mushroom mixture cool for about 10 minutes.
6. Mix the cheese filling.
   In a large bowl, combine the ricotta, 1 cup mozzarella, ½ cup Parmesan, egg, and parsley.Stir in the cooled mushroom mixture until evenly combined. Avoid adding the mushrooms while they are very hot, since they could begin cooking the egg.
7. Start the garlic cream sauce.
   Melt 3 tablespoons of butter in a medium saucepan over medium heat. Add the garlic and cook for about 30 seconds.Sprinkle in the flour and whisk continuously for 1 minute. The mixture should look smooth and lightly foamy.
8. Add the milk and cream.
   Slowly pour in the milk while whisking to prevent lumps. Add the heavy cream, salt, black pepper, and nutmeg.Cook for 4 to 6 minutes, whisking frequently, until the sauce thickens enough to coat the back of a spoon.
9. Finish the sauce.
   Remove the saucepan from the heat. Stir in ½ cup Parmesan until melted and smooth.If the sauce becomes too thick, whisk in another tablespoon or two of milk.
10. Fill the shells.
    Spread about one-third of the garlic cream sauce over the bottom of the prepared baking dish.Spoon approximately 2 tablespoons of mushroom filling into each cooked shell. Arrange the filled shells open-side up in the dish.
11. Add the remaining sauce and cheese.
    Spoon the remaining garlic cream sauce over and around the shells. Sprinkle with 1 cup mozzarella and ¼ cup Parmesan.
12. Bake the stuffed shells.
    Cover the dish loosely with aluminum foil and bake for 20 minutes.Remove the foil and bake for another 10 to 15 minutes, until the sauce bubbles around the edges and the cheese is melted and lightly golden.
13. Rest before serving.
    Let the stuffed shells rest for 5 to 10 minutes. This gives the filling and sauce time to settle, so the shells are easier to serve.Finish with chopped parsley, if desired.

Recipe Notes and Helpful Tips

Cook the mushrooms until dry

Mushrooms release quite a bit of liquid as they cook. Let that moisture evaporate before mixing them with the cheese, or the filling may become watery.

Keep the shells slightly firm

Overcooked shells are difficult to fill and may tear while baking. Cook them just until flexible, then handle them gently.

Try different mushrooms

White button mushrooms are mild and affordable. Cremini mushrooms have a deeper flavor, while a small amount of shiitake can add extra richness.

Add vegetables

Stir 1 cup of chopped cooked spinach into the mushroom filling. Squeeze the spinach very dry first so it does not thin the filling.

Prepare the dish ahead

Assemble the shells, sauce, and topping in the baking dish. Cover and refrigerate for up to 24 hours.

Let the dish stand at room temperature while the oven preheats, then add about 10 minutes to the covered baking time.

Store leftovers

Refrigerate leftover stuffed shells in an airtight container for up to four days. Reheat them covered in a 350°F oven or microwave individual portions with a spoonful of milk added to the sauce.

The assembled shells may also be frozen for up to three months. Thaw them overnight in the refrigerator before baking.

Frequently Asked Questions

Can I make mushroom stuffed shells without ricotta?

Yes. Replace the ricotta with the same amount of cottage cheese. For a smoother filling, blend the cottage cheese briefly before combining it with the mushrooms and other cheeses.

Why did my stuffed shells turn watery?

The mushrooms may not have cooked long enough for their moisture to evaporate. Watery ricotta or poorly drained vegetables can also thin the filling. Cook the mushrooms until the skillet is nearly dry and drain any added vegetables thoroughly.

Can I use jarred Alfredo sauce?

Yes. Use approximately 3 cups of prepared Alfredo sauce instead of the homemade garlic cream sauce. Choose a thick sauce so it stays around the shells rather than collecting at the bottom of the dish.

What should I serve with stuffed shells?

Serve these creamy stuffed shells with a green salad, roasted broccoli, green beans, or garlic bread. A fresh vegetable side balances the rich cheese and cream sauce nicely.

A Cozy Pasta Dinner to Share

The best part comes when the serving spoon lifts out one of those plump shells with browned cheese clinging to the top and creamy sauce underneath. Bring the baking dish straight to the table, add a simple salad, and let everyone help themselves while it is still warm.

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