Mushroom White Sauce Lasagna

Creamy, cheesy, and comforting, this Mushroom White Sauce Lasagna is a delicious twist on traditional tomato-based lasagna. Tender lasagna sheets are layered with buttery sautéed mushrooms, rich homemade white sauce, creamy ricotta, mozzarella, and Parmesan, then baked until bubbling and beautifully golden. It is hearty enough for a family dinner while still feeling elegant enough for entertaining.

Prep Time: 25 minutes
Cook Time: 45 minutes
Resting Time: 15 minutes
Total Time: 1 hour 25 minutes
Servings: 8
Cuisine: Italian-inspired
Category: Main Course, Pasta, Casserole

Ingredients

For the Mushroom Filling

2 tablespoons olive oil

2 tablespoons butter

16 ounces mushrooms, sliced

1 small yellow onion, finely chopped

3 cloves garlic, minced

1 teaspoon dried Italian seasoning

½ teaspoon salt

½ teaspoon black pepper

2 tablespoons fresh parsley, chopped

For the White Sauce

4 tablespoons butter

4 tablespoons all-purpose flour

3 cups whole milk

½ cup heavy cream

½ teaspoon salt

¼ teaspoon black pepper

¼ teaspoon ground nutmeg

½ cup grated Parmesan cheese

For the Cheese Filling

15 ounces ricotta cheese

1 large egg

½ cup grated Parmesan cheese

1 teaspoon Italian seasoning

¼ teaspoon salt

¼ teaspoon black pepper

For Assembly

12 lasagna noodles

3 cups shredded mozzarella cheese

½ cup grated Parmesan cheese

2 tablespoons fresh parsley, chopped

Instructions

Begin by preparing the lasagna noodles according to the package instructions. Cook them until just tender but not overly soft, since they will continue cooking in the oven. Drain the noodles and lay them flat on a lightly oiled baking sheet or clean surface to prevent them from sticking together.

Next, prepare the mushroom filling. Heat the olive oil and butter in a large skillet over medium-high heat. Add the chopped onion and cook for about 3 minutes until it begins to soften. Add the sliced mushrooms and cook for 7 to 10 minutes, stirring occasionally, until the mushrooms release their moisture and become golden brown.

Add the minced garlic, Italian seasoning, salt, and black pepper. Cook for another minute until fragrant. Remove the skillet from the heat and stir in the fresh parsley. Set the mushroom mixture aside.

Prepare the white sauce while the mushrooms are cooking or immediately afterward. Melt the butter in a medium saucepan over medium heat. Sprinkle in the flour and whisk continuously for about 1 to 2 minutes. This creates a smooth roux and removes the raw flour taste.

Gradually pour in the milk while whisking constantly. Add the heavy cream and continue whisking until the sauce becomes smooth. Cook for approximately 5 to 7 minutes, stirring frequently, until the sauce thickens enough to coat the back of a spoon.

Season the sauce with salt, black pepper, and nutmeg. Remove it from the heat and stir in the Parmesan cheese until melted and smooth. If the sauce becomes too thick, whisk in a small splash of milk. The finished sauce should be creamy and pourable because it will continue thickening slightly during baking.

For the cheese filling, combine the ricotta, egg, Parmesan, Italian seasoning, salt, and black pepper in a bowl. Stir until everything is evenly incorporated and creamy.

Preheat the oven to 375°F (190°C). Lightly grease a 9 × 13-inch baking dish.

Spread a thin layer of white sauce over the bottom of the baking dish. Place a layer of lasagna noodles over the sauce. Spread some of the ricotta mixture over the noodles, followed by a portion of the mushroom filling. Spoon white sauce over the mushrooms and sprinkle with mozzarella.

Repeat the layers until all the ingredients are used. Depending on the size of your baking dish, you should have approximately three layers. Finish with a generous layer of white sauce, followed by the remaining mozzarella and Parmesan cheese.

Cover the baking dish loosely with aluminum foil, making sure the foil does not press directly against the cheese. Bake for 30 minutes.

Remove the foil and continue baking for another 10 to 15 minutes, or until the cheese is bubbling, golden brown, and lightly caramelized around the edges.

For an extra golden top, switch the oven to broil for the final 1 to 2 minutes. Watch carefully because the cheese can brown very quickly.

Remove the lasagna from the oven and allow it to rest for at least 15 minutes before slicing. Garnish with fresh parsley and serve warm.

Tips

Brown the mushrooms well: Mushrooms contain a lot of water. Cooking them until their moisture evaporates is important because it concentrates their flavor and prevents the lasagna from becoming watery.

Do not overcrowd the pan: If your skillet is small, cook the mushrooms in batches. Overcrowding causes them to steam instead of brown.

Keep the white sauce slightly loose: A very thick sauce can make the finished lasagna dry. The sauce should be creamy and easily spreadable before assembly.

Whisk the roux properly: When making the white sauce, whisk the flour into the melted butter until smooth before adding the milk. Add the milk gradually to prevent lumps.

Use freshly grated Parmesan: Freshly grated Parmesan melts more smoothly and gives the white sauce a richer flavor.

Do not overcook the noodles: Cook lasagna sheets just until tender. Overcooked noodles can tear during assembly and become mushy after baking.

Rest before cutting: This step makes a big difference. Allowing the lasagna to rest gives the sauces and melted cheese time to settle, resulting in cleaner slices.

Season each component: The mushrooms, white sauce, and ricotta mixture should each be properly seasoned. This creates much more flavor than relying on one heavily seasoned layer.

Cover during the first part of baking: Foil helps the lasagna heat through without allowing the top cheese to brown too quickly.

For an extra creamy result: Add a little more heavy cream to the white sauce or replace part of the mozzarella with shredded fontina cheese.

Make it ahead: Assemble the lasagna several hours ahead and refrigerate it until ready to bake. If baking directly from the refrigerator, add approximately 10 to 15 minutes to the covered baking time.

Variations

Spinach and Mushroom Lasagna: Add 5 ounces of fresh spinach to the mushroom mixture during the final few minutes of cooking. Stir until wilted, then use the mixture in the lasagna layers.

Chicken Mushroom Lasagna: Add 2 cups of cooked shredded chicken to the mushroom filling for a heartier protein-rich version.

Three-Mushroom Lasagna: Combine cremini, shiitake, and oyster mushrooms for a deeper and more complex mushroom flavor.

Garlic Parmesan Lasagna: Increase the garlic in the mushroom filling and add an extra ¼ cup of Parmesan to the white sauce for an especially savory version.

Spinach Ricotta Version: Mix 1 cup of finely chopped cooked spinach into the ricotta filling. Squeeze out as much moisture as possible before adding it.

Vegetable White Lasagna: Add roasted zucchini, bell peppers, spinach, or broccoli between the layers. Make sure the vegetables are cooked and excess moisture is removed first.

Extra Cheesy Lasagna: Add shredded provolone, fontina, or Monterey Jack along with the mozzarella for a richer cheese blend.

Herb-Lover’s Version: Add fresh basil, thyme, rosemary, or extra parsley to the mushroom filling and white sauce.

Low-Meat Option: For a balanced vegetarian meal, increase the mushrooms and add sautéed spinach or zucchini instead of meat.

Crispy Topping: Mix Parmesan with a small amount of breadcrumbs and sprinkle it over the final mozzarella layer before baking for an extra-crispy finish.

Q&A

Can I make Mushroom White Sauce Lasagna ahead of time?

Yes. You can assemble the entire lasagna, cover it tightly, and refrigerate it for several hours before baking. It is an excellent make-ahead dinner for busy days or entertaining.

Can I freeze this lasagna?

Yes. Assemble the lasagna in a freezer-safe baking dish, cover it tightly, and freeze it before baking. Thaw it in the refrigerator overnight before baking for the most even results.

Can I use no-boil lasagna noodles?

Yes. No-boil noodles can work well with this recipe, especially because the white sauce provides plenty of moisture. Follow the package instructions for the appropriate preparation.

Why is my lasagna watery?

The most common reason is excess moisture from the mushrooms or vegetables. Cook mushrooms until their liquid has evaporated and avoid adding watery vegetables without cooking and draining them first.

Can I use milk instead of heavy cream?

Yes. You can replace the heavy cream with additional whole milk. The sauce will be slightly lighter but will still be creamy.

What mushrooms work best?

Cremini or baby bella mushrooms are excellent choices. White button mushrooms are also convenient, while shiitake and oyster mushrooms can add more distinctive flavor.

Can I make it without ricotta?

Yes. You can replace the ricotta mixture with cottage cheese, mascarpone, or an additional layer of béchamel and mozzarella. Ricotta gives the lasagna a classic creamy texture, but there are several good alternatives.

How do I get a beautifully golden top?

Bake the lasagna uncovered for the final 10 to 15 minutes. For an especially golden finish, use the broiler for 1 to 2 minutes while watching closely.

How long should lasagna rest after baking?

Allow it to rest for about 15 minutes. This helps the layers firm up so the lasagna is easier to slice and serve.

Nutrition

Approximate nutrition per serving, based on 8 servings:

Calories: 560 kcal

Protein: 27 g

Carbohydrates: 43 g

Fat: 32 g

Saturated Fat: 17 g

Fiber: 3 g

Sugar: 7 g

Sodium: 780 mg

Cholesterol: 115 mg

Nutrition values are estimates and can vary depending on the brands of cheese, milk, noodles, and other ingredients used, as well as portion size.

Conclusion

Mushroom White Sauce Lasagna is a rich, creamy, and deeply comforting alternative to traditional tomato-based lasagna. The combination of golden mushrooms, silky Parmesan white sauce, creamy ricotta, tender pasta, and bubbling mozzarella creates layers of flavor and texture in every bite.

The key to an excellent result is taking a little extra time with the mushrooms and white sauce. Properly browned mushrooms provide concentrated savory flavor, while a smooth homemade white sauce keeps the lasagna moist and luxurious without overpowering the other ingredients.

Serve it with a simple green salad, roasted vegetables, or warm garlic bread for a complete family dinner. Whether you make it for a cozy weekend meal, a holiday gathering, or a special dinner with friends, this creamy mushroom lasagna is sure to become a favorite.