Get ready to fall utterly in love with this Spinach & Mushroom White Lasagna. Imagine layers of tender noodles, a creamy white béchamel sauce, savory mushrooms, and vibrant spinach—all topped with bubbling cheese that turns each bite into pure comfort. Whether you’re feeding a crowd, seeking a show-stopping vegetarian centerpiece, or simply craving something cozy and satisfying, this Spinach & Mushroom White Lasagna checks every single box.
Ingredients You’ll Need
Despite its elegant feel, Spinach & Mushroom White Lasagna calls for straightforward ingredients you probably already have on hand. Every component brings something special, from richness to an earthy bite or a pop of freshness. Here’s what you’ll need to make magic happen:
- Lasagna noodles: Go for 9–12 noodles, either cooked ahead or oven-ready, for those beautiful, crowd-pleasing layers.
- Olive oil: Just 2 tablespoons to help your veggies become deeply flavorful in the sauté pan.
- Mushrooms: 12 oz sliced mushrooms bring a meaty texture and umami punch that anchors the whole dish.
- Onion: One small onion, diced, gives your filling a savory sweetness that rounds everything out.
- Garlic: Three cloves, minced, add a fragrant, irresistible base note—don’t skimp!
- Fresh spinach: Five ounces of spinach wilt down beautifully, adding color and earthy depth.
- Salt & pepper: A little goes a long way to balance and enhance all the flavors.
- Italian seasoning: One teaspoon delivers those classic herbal vibes that scream “lasagna!”
- Butter or olive oil: Four tablespoons create the heart-stoppingly creamy white sauce base.
- Flour: Four tablespoons is all you need to thicken your dreamy béchamel sauce.
- Milk: Three cups (any type, dairy or unsweetened plant milk) gives you that silky texture.
- Grated Parmesan: One cup adds nutty, salty complexity—vegan Parmesan swaps in easily here.
- Nutmeg: Half a teaspoon is optional, but it brings a subtle warmth that makes the sauce sing.
- Ricotta cheese: One and a half cups brings creamy richness; use plant-based ricotta for a vegan version.
- Shredded mozzarella: One cup gets you those glorious strings of gooey cheese on top.
How to Make Spinach & Mushroom White Lasagna
Step 1: Sauté the Vegetables
Start by heating your olive oil in a large skillet over medium heat. Sauté the onions first, letting them soften until they’re just translucent—this unlocks their natural sweetness and develops a flavorful foundation. Next, add your garlic and give it a quick minute to become fragrant. Now, pile in the mushrooms and cook them until they’re beautifully browned and have released all their moisture. Finish by stirring in your fresh spinach just until it wilts. Season the pan with salt, pepper, and Italian seasoning, then set this savory, veggie-packed filling aside.
Step 2: Make the Creamy White Sauce
Melt your butter (or use olive oil for a vegan twist) in a saucepan over medium heat. Whisk in the flour and let it cook for about a minute—this quick step removes the raw taste and helps your sauce thicken later. Slowly pour in your milk, whisking constantly to avoid lumps, and cook until the sauce starts to thicken into a luscious béchamel. Stir in the grated Parmesan, a pinch of nutmeg, and taste for salt and white pepper. This sauce is what sets Spinach & Mushroom White Lasagna apart from the classic red version—expect compliments!
Step 3: Prepare the Cheese Layer
In a small bowl, combine your ricotta (or vegan alternative) and half of the shredded mozzarella. Give it a quick stir to get everything nicely mixed and ready for layering. The ricotta mixture brings a soft creaminess to every bite of Spinach & Mushroom White Lasagna, while the mozzarella ensures those irresistible melty cheese moments.
Step 4: Assemble the Lasagna
Now comes the fun part! Start by spreading a thin layer of your white sauce over the bottom of your baking dish—this keeps the noodles from sticking and adds extra moisture. Arrange your first layer of lasagna noodles, then add a generous layer of the ricotta mixture. Pile on your sautéed mushroom and spinach filling, then drizzle more white sauce over the top. Repeat these layers as needed, finishing with noodles, the remaining white sauce, and plenty of shredded mozzarella right on top. This stacking is what creates those gorgeous, distinct layers that make Spinach & Mushroom White Lasagna such a visual treat.
Step 5: Bake to Perfection
Cover your lasagna dish with foil (to keep it all moist and gooey) and bake at 375°F (190°C) for 30 minutes. Then, remove the foil and bake for another 15 minutes, until the lasagna is deliciously bubbly and golden brown on top. The kitchen will smell heavenly, and you’ll know it’s ready when that cheesy top is irresistible.
Step 6: Rest and Slice
As hard as it is, let your Spinach & Mushroom White Lasagna rest for at least 10 minutes before slicing. This step helps the layers set up, making for cleaner squares and a better eating experience. Trust me—it’s worth the wait!
How to Serve Spinach & Mushroom White Lasagna
Garnishes
Give your Spinach & Mushroom White Lasagna the finishing touch it deserves with a shower of fresh basil or parsley, a sprinkle of extra Parmesan, or even a pinch of red chili flakes if you love a kick. These bright, aromatic garnishes make each serving look straight out of a trattoria and add a welcome burst of color.
Side Dishes
Pair each slice with a crisp, lemony green salad or a simple tomato salad for contrast, plus garlicky bread or focaccia to soak up any extra sauce. Roasted vegetables also make a fantastic, hearty companion—think roasted carrots, asparagus, or even baby potatoes.
Creative Ways to Present
For a dinner party twist, try making individual ramekins of Spinach & Mushroom White Lasagna for an elegant, personalized presentation. Or, serve smaller squares as a side at a bigger Italian feast. Even leftover slices can be reheated and packed into a lunchbox for the world’s luckiest next-day meal.
Make Ahead and Storage
Storing Leftovers
Leftover Spinach & Mushroom White Lasagna is an absolute blessing—simply cover your baking dish tightly or transfer slices to airtight containers. It will keep well in the refrigerator for up to 4 days, and the flavors only get deeper and more delicious.
Freezing
You can freeze the entire lasagna or individual slices. Once cooled, wrap them tightly in foil and place in a freezer-safe bag or container. Spinach & Mushroom White Lasagna holds up beautifully in the freezer for up to 2 months; just be sure to thaw overnight in the fridge before reheating.
Reheating
To reheat, cover your lasagna with foil and warm in a 350°F (175°C) oven until hot and bubbling (about 20–30 minutes for a whole casserole, or 10–15 for individual slices). For a quicker option, use the microwave in short bursts, but oven baking keeps the top cheese beautifully crisp.
FAQs
Can I make Spinach & Mushroom White Lasagna gluten-free?
Absolutely! Simply use gluten-free lasagna noodles and swap the all-purpose flour for a gluten-free blend or cornstarch in your white sauce. The rest of the recipe remains exactly as scrumptious.
How can I make this recipe vegan?
Making a vegan Spinach & Mushroom White Lasagna is easy: use olive oil instead of butter, plant-based milk, vegan ricotta and mozzarella, and vegan Parmesan for the white sauce. The result is still creamy, comforting, and packed with flavor.
What mushrooms work best in this lasagna?
You can use classic cremini or white button mushrooms, or get fancy with portobello, shiitake, or even a mix. The deeper the mushroom flavor, the more umami your Spinach & Mushroom White Lasagna will boast!
Can I assemble it in advance?
Yes! Prepare the entire lasagna, cover tightly, and refrigerate for up to 24 hours before baking. It’s a lifesaver for entertaining or busy nights—just add a few extra minutes to the bake time if starting cold.
Why let lasagna rest before cutting?
Waiting 10 minutes before slicing allows everything to set up and makes for tidy, picture-perfect layers. This quick pause also mellows the flavors, resulting in every bite of Spinach & Mushroom White Lasagna being just right.
Final Thoughts
If you’re ready for a cozy, crowd-pleasing comfort food with a touch of elegance, Spinach & Mushroom White Lasagna is your new go-to. It’s a labor of love that’s 100% worth the effort—so gather your ingredients, invite some friends, and dive into layers of cheesy, veggie-packed bliss. You’ll want to make this again and again!