butternut squash and kale lasagna with creamy cheese sauce for winter dinners

The first time I made this butternut squash and kale lasagna, it was the kind of January night when the wind rattles the maple limbs like dry bones and the driveway glitters with black ice. My farmer-friend had just dropped off a crate of sugar-dense squash that had cured in her barn since October, and the kale in my hoop house was the only thing still green after three nights below zero. I wanted—no, needed—something that felt like a cashmere blanket in food form, but I was tired of the same tomato-based lasagna that always left me sleepy before the dishes were done.

So I roasted half-moons of squash until their edges caramelized into smoky candy, wilted ribbons of kale in garlic-kissed butter, and whisked a mascarpone–fontina sauce so silky it could have been a scarf from Milan. One bite and the winter blues slipped off my shoulders like an oversized coat. My neighbors texted the next day asking if there were leftovers (there weren’t), and my kids—who swear kale is “lawn clippings”—asked me to make it again that same week. Ten winters later, the recipe card is smeared with squash purée and nutmeg, a tiny testament to how many times it’s saved our Sunday suppers.

Ingredient Breakdown

Butternut squash – Choose specimens with a matte, peanut-colored skin and a bulbous bottom heavy for its size. Roasting concentrates the natural sugars and intensifies the nutty undertones. If you’re short on time, pick up two 15-oz cans of pumpkin purée, but the caramelized depth of roasted squash is worth the extra 25 minutes.

Lacinato (dinosaur) kale – Its bumpy, blue-green leaves hold up to baking without turning bitter. Strip the center rib, stack leaves like dollar bills, and slice into ½-inch ribbons. If you only have curly kale, give it a quick blanch to soften the curl.

Fontina & mascarpone – Fontina melts into a buttery, slightly tangy web; mascarpone adds cloud-like richness. If you can’t find fontina, young Gruyère or mild provolone work, but avoid pre-shredded—they’re dusted with cellulose that can turn the sauce grainy.

Evaporated milk – The unsung hero of silky sauces. It’s concentrated, so you get body without the butterfat of heavy cream, letting the squash flavor shine.

No-boil lasagna sheets – Look for the ruffled edges; they trap sauce and create those crave-worthy crispy corners. Gluten-free brown-rice noodles perform beautifully here—just add 2 Tbsp extra milk to the sauce.

Step-by-Step Instructions

1. 1

   Roast the squash

   Preheat oven to 425 °F (220 °C). Peel, seed, and cube one large (3-lb) butternut squash into ¾-inch pieces. Toss with 2 Tbsp olive oil, 1 tsp kosher salt, ½ tsp black pepper, and a pinch of nutmeg. Spread on a parchment-lined rimmed sheet and roast 25–30 min, turning once, until edges blister and a paring knife glides through with zero resistance. Cool 5 min, then transfer half to a bowl; mash the other half with a fork for a rustic purée. This dual texture is the secret to lasagna that doesn’t slump.

2. 2

   Wilt the kale

   Reduce oven to 375 °F (190 °C). In a Dutch oven over medium heat, melt 2 Tbsp butter with 1 Tbsp olive oil. Add 2 minced garlic cloves and 1 tsp red-pepper flakes; bloom 30 sec until fragrant but not browned. Add 8 cups packed kale ribbons, ¼ cup water, and ½ tsp salt. Cover and steam 4 min, tossing twice, until bright emerald. Drain in a colander, squeeze out excess liquid, and season with a squeeze of lemon to keep the color vibrant.
3. 3

   Build the creamy cheese sauce

   In the same pot (no need to rinse), melt 3 Tbsp butter. Whisk in 3 Tbsp flour; cook 2 min to a pale blond roux. Slowly pour in 1 can (12 oz) evaporated milk and ¾ cup vegetable stock, whisking until smooth. Simmer 3 min until thick enough to coat the back of a spoon. Off heat, stir in 4 oz mascarpone, 1 cup grated fontina, ½ cup grated Parmesan, ¼ tsp freshly grated nutmeg, and ½ tsp white pepper. Fold in the mashed squash; adjust salt to taste. You should have about 3 cups of satin lava.

4. 4

   Prep the pan & first layer

   Butter a 9×13-inch ceramic baking dish. Spread ¼ cup sauce thinly on the bottom to prevent noodle stickage. Arrange 3 no-boil sheets side by side (break to fit). Top with half the cubed squash, half the kale, ⅓ of the remaining sauce, and ⅓ of the fontina. Press down gently to eliminate air pockets—the enemy of cohesive slices.
5. 5

   Repeat & crown

   Add another noodle layer, the remaining squash and kale, half the remaining sauce, and half the remaining fontina. Finish with a third noodle layer, the rest of the sauce, and a snowfall of the final fontina plus ¼ cup Parmesan. Cover loosely with foil that’s been sprayed with cooking spray (prevents sticking).

6. 6

   Bake, rest, serve

   Bake 25 min covered, then uncover and bake 20–25 min more until the top is blistered and a knife inserted in the center meets zero resistance. Broil 1–2 min for bronze bubbles. Let rest 15 min—this allows the sauce to thicken so your squares slice like a dream. Garnish with fried sage leaves or a drizzle of balsamic reduction if you’re feeling fancy.

Expert Tips & Tricks

• Double-roast for depth: Roast the squash earlier in the day, then crank the oven up to 450 °F for the final 5 minutes to deepen the Maillard browning.
• Make it keto: Swap noodles for thin ribbons of roasted zucchini; salt and let drain 10 min to remove moisture.
• Batch-blanch kale: Process an extra bunch, squeeze dry, and freeze in muffin tins for future soups or smoothies.
• Prevent watery lasagna: If your squash looks wet after roasting, spread on a clean kitchen towel and pat dry before layering.
• Smoke-kissed version: Add ½ tsp smoked paprika to the roux and swap fontina for smoked gouda.
• Reheat like a pro: Warm individual slices in a skillet with a splash of broth and a lid; the bottom crisps like frico while the top steams.

Common Mistakes & Troubleshooting

Variations & Substitutions

• Butternut → Pumpkin or Kabocha: Equal volume; kabocha skin is edible—roast unpeeled for extra fiber.
• Kale → Swiss Chard: Remove rainbow stems, chop, and sauté with a pinch of sugar to tame earthiness.
• Fontina → Vegan: Use 1 cup soaked cashews blended with ½ cup oat milk, 2 Tbsp nutritional yeast, and 1 Tbsp white miso.
• Add protein: Fold 2 cups shredded rotisserie chicken or browned Italian sausage into the kale layer.
• Gluten-free roux: Replace flour with 2 Tbsp sweet-rice flour or 1 Tbsp cornstarch slurry.
• Lemon-bright spring version: Swap nutmeg for lemon zest and stir ½ cup peas into the kale.

Storage & Freezing

Refrigerator: Cool completely, cover tightly with foil, and refrigerate up to 4 days. Reheat squares in a 325 °F oven for 20 min, adding a splash of broth under the foil to re-steam.

Freezer whole: Assemble, cool, wrap entire dish in plastic then foil. Freeze up to 3 months. Thaw 24 hr in fridge, then bake 375 °F 45 min covered, 15 min uncovered.

Freezer portions: Cut into 8 squares, flash-freeze on a tray, then vacuum-seal or bag. Microwave 3–4 min or oven 15 min from frozen.

Frequently Asked Questions

Happy winter layering! Tag me on Instagram @cozycoldkitchen so I can see your gorgeous, cheesy squares.

Butternut Squash & Kale Lasagna

4.7

Print Recipe Pin Recipe

Prep

25 min

Cook

45 min

Total

1 hr 10 min

8 servings

Medium

Ingredients

• 1 lb butternut squash, peeled & cubed
• 8 oz lasagna noodles, no-boil
• 4 cups kale, chopped & stems removed
• 2 cups ricotta cheese
• 1½ cups mozzarella, shredded
• 1 cup parmesan, grated
• 2 cups whole milk
• 3 tbsp butter
• 3 tbsp all-purpose flour
• 2 cloves garlic, minced
• ¼ tsp ground nutmeg
• Salt & black pepper to taste
• 2 tbsp olive oil
• ½ cup white wine (optional)

Instructions

1. Preheat oven to 400 °F. Toss squash with olive oil, salt, pepper; roast 20 min until tender.
2. Steam kale 3 min until wilted; squeeze dry and chop finely.
3. Make béchamel: melt butter, whisk in flour 2 min, slowly add milk until thick. Stir in parmesan, nutmeg, salt, pepper.
4. Combine ricotta with half the mozzarella and the roasted squash cubes.
5. Spread ½ cup béchamel on a 9×13-inch dish. Layer noodles, ricotta mixture, kale, béchamel; repeat twice, ending with sauce.
6. Top with remaining mozzarella; cover with foil.
7. Bake 25 min, uncover and bake 15 min until bubbling and golden.
8. Rest 10 min before slicing. Serve hot with crusty bread.

Recipe Notes

• Squash can be roasted a day ahead.
• Use gluten-free noodles if needed.
• Swap kale for spinach or Swiss chard.

Calories: 410 Protein: 21 g Fat: 22 g Carbs: 33 g