This Sage Butternut Squash Gratin is a cozy and elegant fall-inspired dish, perfect for Thanksgiving or any comforting dinner spread. Tender slices of butternut squash are layered with a rich cream sauce infused with garlic, shallot, and sage, then baked to golden perfection with a crispy parmesan topping. It’s vegetarian, naturally gluten-free, and a beautiful addition to your seasonal table.

Full Recipe:

Ingredients

2 lb (900g) butternut squash, peeled and sliced into 1/8-inch half-rounds
3 tablespoons butter
1 large shallot, minced
4 garlic cloves, roughly chopped
1 tablespoon all-purpose flour
1 cup low-sodium vegetable stock
1 cup heavy whipping cream
15 sage leaves
1/2 teaspoon pepper
1/2 teaspoon onion powder (optional)
3 oz (100g) grated parmesan cheese
1 teaspoon chopped chives, for garnish (optional)

Directions

Preheat the oven to 400ºF (200ºC).
Peel and slice the butternut squash into 1/8-inch thick half-rounds. Discard seeds or reserve the bottom portion for another use.
In a saucepan, melt butter and sauté the minced shallot and garlic until fragrant (1–2 minutes).
Stir in the flour to form a roux.
Gradually whisk in vegetable stock while stirring constantly.
Add the cream, pepper, onion powder (if using), and sage. Stir gently until the sauce is smooth (do not boil).
Butter a 9×13-inch baking dish. Spread 1/3 of the cream sauce on the bottom and sprinkle a bit of parmesan.
Layer the butternut squash slices in rows, slightly overlapping.
Pour the remaining sauce over the squash. Cover with parchment paper and then foil.
Bake for 20 minutes.
Uncover, sprinkle remaining parmesan, and bake for another 10 minutes until golden and bubbly.
1. Garnish with fresh chives and serve immediately.

Nutrients (approximate per serving, based on 6 servings)

Note: Nutrition may vary based on exact brands and measurements used.

Calories: ~250–300 kcal
Protein: ~5–7g
Fat: ~20g (mostly from cream and cheese)
Carbohydrates: ~18–22g
Fiber: ~3–4g
Sugar: ~4–6g
Sodium: ~300–400mg

Celebrating Seasonal Ingredients

At the heart of this gratin lies butternut squash, a quintessential autumn vegetable that thrives in cooler months. Its naturally sweet, nutty flavor makes it ideal for roasting, baking, and pairing with herbs like sage. By utilizing peak-season produce, this recipe ensures maximum flavor and freshness. Sage brings a woodsy, slightly peppery taste that complements the squash beautifully, turning a few simple ingredients into a culinary celebration of fall.

The Allure of a Creamy Gratin

There’s something undeniably indulgent about a gratin. Its creamy texture, crisp topping, and tender center evoke a sense of home and hearth. This version steers clear of heaviness while still offering that classic comfort. The use of a roux-based sauce—made from butter, shallot, garlic, and a touch of flour—provides structure without overwhelming the dish. Cream and vegetable stock meld to form a smooth, velvety base, while the garlic and shallot lend depth and subtle sweetness.

Aromatic Sage: A Seasonal Star

Sage is more than just a garnish—it’s an essential flavor driver in this recipe. When steeped in warm cream, its oils infuse the sauce with a mellow, herbaceous note that lingers in each bite. Sage has long been associated with fall and holiday cooking, particularly in stuffings and roasted vegetables. Here, it plays a leading role, adding complexity to the gratin without overpowering the other elements.

Texture Matters: Layers of Delight

This gratin succeeds not just because of its flavor, but because of its texture. The butternut squash slices are carefully layered, ensuring they cook evenly and maintain their structure. As the dish bakes, the squash becomes tender but not mushy, creating a satisfying bite. The top layer, kissed by oven heat and covered in parmesan, forms a golden crust that provides a delightful contrast to the creamy interior. Every forkful delivers a bit of crunch, softness, and richness.

Naturally Gluten-Free and Vegetarian-Friendly

One of the standout features of this gratin is its inclusivity. It’s completely vegetarian, making it suitable for a range of diets. And though a small amount of flour is used to thicken the sauce, it can easily be swapped with a gluten-free alternative if necessary. This makes the dish adaptable for gluten-sensitive guests without compromising on flavor or integrity. It’s a versatile offering that can serve as a main course for vegetarians or a hearty side for omnivores.

A Perfect Fit for the Holiday Table

Visually appealing and full of flavor, this dish deserves a place at the center of your fall and winter feasts. It pairs beautifully with roasted meats, stuffed mushrooms, green beans, or cranberry sauces, and its warm hues look stunning on a festive table. The prep is straightforward enough for a cozy dinner at home, yet the final result feels celebratory and special. Whether you’re hosting Thanksgiving or a simple autumn dinner party, the gratin brings both charm and substance to the table.

Balanced Nutrition in Every Bite

While rich and creamy, this dish strikes a balance in nutrition. Butternut squash provides a good dose of fiber, vitamins A and C, and complex carbohydrates. The cream and cheese add fat and protein, but not excessively so when served in appropriate portions. Each serving delivers a satisfying amount of energy without leaving diners feeling overly full. It’s comfort food done thoughtfully—indulgent, but not excessive.

Make-Ahead Friendly and Versatile

Another key advantage of this gratin is its make-ahead capability. You can prepare it up to the baking stage, cover, and refrigerate it for a day in advance. When ready to serve, simply bake it until bubbly and golden. This flexibility makes it ideal for holiday cooking, when oven space and timing are at a premium. You can also tweak the ingredients to suit your preferences—swap sage for thyme or rosemary, or add a layer of sautéed mushrooms or caramelized onions for extra dimension.

Visual Appeal: Rustic Elegance

The dish doesn’t just taste good—it looks good. The layered squash, golden crust, and touch of fresh herbs on top present beautifully in a serving dish. Its naturally vibrant colors evoke a warm, rustic charm that enhances any meal setting. Whether served in a classic ceramic baking dish or plated individually, the gratin offers a visual as well as a culinary feast.

Conclusion: A Dish Worth Savoring

Sage Butternut Squash Gratin is more than a side dish—it’s a seasonal celebration in casserole form. Rich but balanced, comforting yet elegant, it embodies the essence of fall and brings warmth to any meal. The harmony between tender squash, fragrant sage, and creamy sauce is a testament to the power of simple, well-chosen ingredients. Whether you’re preparing it for a festive holiday gathering or a casual family dinner, this gratin offers nourishment, flavor, and joy. It’s a timeless recipe that invites you to slow down, savor the season, and enjoy the cozy pleasures of good food.