If you are looking for a dish that makes everyone linger a little longer at the table, this butternut squash lasagna is it. Layered with sweet roasted squash, a creamy sage-scented ricotta, and a cozy béchamel that hugs every bite, it turns a handful of simple ingredients into something that feels genuinely special. It is golden and bubbling, comforting yet elegant, and it has a way of quieting a whole room the moment it comes out of the oven.
This is the kind of vegetarian main that works just as beautifully on a chilly Tuesday as it does at the center of a holiday spread. It layers cleanly without turning soggy, it can be assembled a day ahead, and it reheats like a dream. Whether you are feeding your family or hosting friends, this is one you will find yourself making on repeat once autumn rolls around.
Why You’ll Love This Recipe
This lasagna was born from one of my very first autumn dinner parties as a personal chef. My client wanted something vegetarian, elegant, and deeply comforting, and the result was this cheesy, golden masterpiece that had every guest asking for the recipe before the plates were even cleared. It has been my go-to cold-weather showstopper ever since.
Part of the magic is in the little details that lift it above an ordinary casserole. Fresh sage and a whisper of lemon zest give the ricotta a fragrant, almost perfumed quality, while roasting the squash concentrates its natural sweetness into something caramelized and rich. Those touches make the whole dish taste layered and considered rather than heavy.
It is also endlessly practical. This is a true make-ahead dish for entertaining, it adapts easily for gluten-free and dairy-free diets, and it freezes well for future dinners. You get the impressive payoff of a from-scratch lasagna with a build that is far more forgiving than it looks.
Ingredients
The heart of the dish is 1 medium butternut squash, about 2 to 2.5 pounds, peeled and cut into 1-inch cubes, tossed with 2 tablespoons of olive oil and salt and pepper to taste before roasting. For the creamy filling you will mix 1 ½ cups of whole-milk ricotta with ½ cup of grated Parmesan, 1 large egg, 2 to 3 tablespoons of finely chopped fresh sage (or 1 tablespoon dried), and the zest of ½ a lemon, which is optional but truly recommended for the brightness it brings.
The béchamel is a quick, classic affair: 2 tablespoons of butter and 2 tablespoons of all-purpose flour cooked into a roux, then whisked with 2 cups of warm whole milk and finished with a pinch of ground nutmeg. This silky sauce is what ties every layer together and keeps the lasagna luscious rather than dry.
To assemble, you will need 9 to 12 lasagna noodles, either regular or no-boil, and an extra ½ cup of Parmesan for the top. For an even meltier finish, add 1 cup of shredded mozzarella or fontina, and keep a few fresh sage leaves aside to crisp for garnish. Fontina in particular gives a buttery melt that pairs beautifully with the sweet squash.
Step-by-Step Instructions
Begin by preheating your oven to 425°F (220°C) and lining a baking sheet with parchment paper. Toss the cubed squash with olive oil, salt, and pepper, spread it in a single layer, and roast for 25 to 30 minutes until it is soft and caramelized at the edges. Let it cool slightly, then mash or blend it into a rough purée, keeping a little texture rather than making it perfectly smooth.
While the squash roasts, make the ricotta filling. In a bowl, combine the ricotta, ½ cup Parmesan, egg, chopped sage, lemon zest if using, and a little salt and pepper. Stir until evenly blended and set it aside so the flavors can mingle.
For the béchamel, melt the butter in a small saucepan over medium heat, stir in the flour, and cook for 1 to 2 minutes to lose the raw taste. Slowly whisk in the warm milk and keep cooking until the sauce is thick and smooth, then season with salt, pepper, and nutmeg. Keep it warm while you prep the noodles. If you are using regular lasagna sheets, boil them until al dente, then drain and cool; skip this entirely if you are using no-boil noodles.
Now build the lasagna in a 9×13-inch baking dish. Spread a thin layer of béchamel across the bottom, then add a layer of noodles, followed by roasted squash, generous dollops of the sage ricotta, and a drizzle of béchamel. Repeat the layers, finishing with a generous blanket of béchamel on top, then sprinkle over the remaining Parmesan and the mozzarella or fontina if using.
Cover the dish tightly with foil and bake at 375°F (190°C) for 35 to 40 minutes. Remove the foil and bake for another 10 to 15 minutes, until the top is bubbly and golden. Let the lasagna rest for 10 to 15 minutes before slicing so the layers can set, then garnish with fresh or crisped sage leaves. All told you are looking at about 30 minutes of prep and 50 minutes of cooking, roughly 1 hour and 20 minutes total, for 6 to 8 hearty servings.
Tips for the Best Butternut Squash Lasagna
Two small habits make a big difference here. First, mash the squash rather than blending it into a completely smooth purée, since a little texture in the filling keeps each layer interesting. Second, always use warm milk for the béchamel, which helps it come together silky and lump-free rather than seizing into a paste. And be sure to let the finished lasagna rest before slicing, as those ten minutes are what allow it to hold its shape on the plate.
This dish also loves a little customization. Layer in sautéed spinach or kale for a nutrient boost, swap in gluten-free noodles and a GF flour blend to keep it celiac-friendly, or use plant-based cheeses and an olive oil béchamel with unsweetened almond milk for a dairy-free version. If you are building a full cozy menu, it sits beautifully alongside a warming starter like my silky carrot and ginger soup, and for another crowd-pleasing one-pot pasta night, my Instant Pot chicken Alfredo pasta is always a hit.
Finally, do not be shy about doubling the batch. This lasagna freezes wonderfully, so assembling two and tucking one away means a future weeknight where dinner is already handled. Your future self will thank you.
Kitchen Gear for This Recipe
- Instant-Read Meat Thermometer
- Enameled Cast Iron Dutch Oven
- Heavy-Duty Sheet Pan Set
- Glass Mixing Bowl Set
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Frequently Asked Questions
Can I make this ahead of time?
Absolutely. Assemble the lasagna up to 1 day in advance, cover it tightly with foil, and refrigerate. Add about 15 extra minutes to the bake time if you are cooking it straight from the fridge.
Can I freeze leftovers?
Yes. Slice the lasagna into portions and freeze them individually for easy grab-and-heat dinners. Reheat in the microwave or oven until hot all the way through.
What is the best way to crisp the sage?
Heat a little olive oil in a skillet and fry whole sage leaves for 10 to 20 seconds until crisp. Drain them on paper towels and add a tiny pinch of salt. They make a gorgeous, fragrant garnish.
Can I use no-boil noodles?
Definitely. No-boil lasagna sheets save time and work perfectly here since the béchamel and roasted squash provide plenty of moisture. Just layer them in dry and let the oven do the rest.
What should I serve with butternut squash lasagna?
A crisp arugula salad and roasted Brussels sprouts make it a festive vegetarian spread. For wine, a crisp white like Soave or a buttery Chardonnay complements the sage and squash beautifully.
If this dish leaves you craving more wholesome inspiration, take a look at these healthy eating ideas from our sister site. And if you make this lasagna, I would be thrilled to see your golden, cheesy layers, so snap a photo and tag @thekitchensaid on Instagram.
Creamy Butternut Squash Lasagna with Fresh Sage Ricotta
Vegetarian · Main Course
A cozy butternut squash lasagna layered with sweet roasted squash, fragrant sage ricotta, and silky béchamel, perfect as a make-ahead vegetarian main.
Ingredients
- 1 medium butternut squash (2-2.5 lbs), peeled and cut into 1-inch cubes
- 2 tablespoons olive oil
- Salt and pepper, to taste
- 1 1/2 cups whole-milk ricotta
- 1/2 cup grated Parmesan, plus 1/2 cup more for topping
- 1 large egg
- 2-3 tablespoons fresh sage, finely chopped (or 1 tablespoon dried)
- Zest of 1/2 lemon (optional)
- 2 tablespoons butter
- 2 tablespoons all-purpose flour
- 2 cups warm whole milk
- Pinch of ground nutmeg
- 9-12 lasagna noodles (regular or no-boil)
- 1 cup shredded mozzarella or fontina (optional)
- Fresh sage leaves, for garnish
Instructions
- Roast cubed squash tossed with olive oil, salt, and pepper at 425F for 25 to 30 minutes, then mash roughly.
- Mix ricotta with 1/2 cup Parmesan, egg, sage, lemon zest, salt, and pepper.
- Make a béchamel by cooking butter and flour, whisking in warm milk until thick, and seasoning with salt, pepper, and nutmeg.
- Layer béchamel, noodles, roasted squash, sage ricotta, and more béchamel in a 9x13-inch dish, finishing with béchamel and cheese on top.
- Bake covered at 375F for 35 to 40 minutes, then uncovered 10 to 15 minutes until golden. Rest 10 to 15 minutes before slicing.
Nutrition: 380 calories
