A Comfort Food Classic Gets a Creamy Twist: White Lasagna with Sausage and Mushrooms

If you’re in the mood for something rich, hearty, and soul-soothing, creamy white lasagna might just be the dish your dinner table has been waiting for. This isn’t your average tomato-sauce-and-ricotta lasagna—instead, it’s a luxurious, cheese-laden dish filled with layers of pasta, savory Italian sausage, earthy mushrooms, tender spinach, and a velvety béchamel sauce. Topped with melted mozzarella and a sprinkle of Parmesan, it’s a casserole that feels both indulgent and deeply satisfying.
Unlike red lasagna, which can lean tangy or acidic, this version leans into its richness. Every bite offers smooth creaminess, punctuated by the warmth of fennel-laced sausage and the deep umami of sautéed mushrooms. Spinach adds freshness, while nutmeg in the béchamel gives the dish a subtle aromatic edge.
Though it takes time and a little effort, this white lasagna pays you back tenfold in comfort—and leftovers. Let’s break down how to make it and why each step matters.
Layers of Flavor: The Key Ingredients

The foundation of this lasagna is simple but carefully built:
- Italian Sausage: Choose mild or hot, depending on your preference. Either way, the built-in spices of the sausage (especially the fennel and garlic) add depth with no extra seasoning required.
- Mushrooms: A mix of cremini and shiitake mushrooms brings earthiness and texture. Browned in olive oil, they create the kind of savory base that makes each bite feel complex and satisfying.
- Spinach and Garlic: The spinach wilts down into the mixture, adding both color and a touch of bitterness that balances the rich cheese and sauce.
- Béchamel Sauce: This is the star of the show. Made from butter, flour, and whole milk, it’s smooth, creamy, and spiced with bay leaves and nutmeg. Parmesan gives it a gentle sharpness that complements the mozzarella in the final layers.
- Mozzarella and Parmesan: The cheeses bring gooeyness and golden top-layer perfection. Use low-moisture mozzarella to avoid excess water in the finished dish.
Making the Lasagna
While there are several steps, many can be done in advance to ease the load.
- Prep the Pasta: Instead of boiling lasagna noodles, soak them in hot water. This trick softens them enough for layering without the mess and risk of overcooking.
- Cook the Filling: Brown the sausage first, then cook the mushrooms until golden. Add garlic, thyme, salt, and pepper, then finish with a splash of water and the spinach. Stir it all together for a delicious filling that smells like home.
- Whisk the Sauce: The béchamel comes together quickly but requires attention. Cook the butter and flour for a minute before slowly adding the milk. Keep whisking until it thickens, then stir in the Parmesan.
- Assemble: Spread a bit of béchamel on the bottom of a greased baking dish, then layer noodles, sausage mixture, sauce, and mozzarella. Repeat three times, finishing with a final layer of noodles, more sauce, and a generous sprinkle of cheese.
- Bake: Cover tightly with greased foil and bake for 30 minutes, then uncover to let the top brown for another 15. If you like a deeply golden, bubbling top, give it a quick broil at the end.
Let the lasagna rest for about 15 minutes before slicing—this helps it set up and slice cleanly.
Tips to Make It Easier
- Prep Ahead: Both the filling and the white sauce can be made up to two days in advance and stored in the fridge. Just reheat the sauce gently before layering.
- Make-Ahead Friendly: You can assemble the lasagna up to a day ahead and store it unbaked in the fridge. Or freeze it for up to three months.
- Baked and Leftover Ready: Already-baked lasagna can also be refrigerated or frozen. Just be sure to wrap it well.
- No Boil, No Problem: The noodle-soaking method saves a pot and simplifies prep. Be sure to agitate them while they soak so they don’t stick together.
- Fixing the Sauce: If your béchamel turns out lumpy, don’t panic. An immersion blender can smooth it out in seconds—just remove from heat before blending.
Serving Suggestions
This white lasagna is rich, so you don’t need huge portions. Serve it with a crisp green salad, maybe a lemony vinaigrette to cut through the creaminess, and a slice of garlic bread or a hunk of crusty baguette. It’s a perfect centerpiece for a cozy family dinner, a gathering with friends, or just a Sunday afternoon when you feel like cooking something beautiful.
The beauty of white lasagna lies not just in its flavor but in its generosity. It feeds a crowd, reheats like a dream, and satisfies every comfort-food craving you can think of. Whether you’re new to lasagna or a seasoned layering pro, this creamy version just might become your new go-to.