Gratins are usually rich with butter and cream, but this lightened Butternut Squash Gratin keeps the comforting texture and deep flavor while cutting calories and fat. It’s a healthier, flavorful side dish that pairs perfectly with roasted turkey, chicken, pork, or a simple weeknight protein. If you enjoy layered, cheesy bakes but want to skip the heavy cream, this recipe delivers the same cozy appeal with fewer calories and a bright, herb-forward finish.
Butternut Squash Gratin
This lighter gratin uses milk, fresh herbs, garlic, and a modest amount of Parmesan to build savory depth without heavy cream. A crunchy whole-wheat or gluten-free panko topping gives a satisfying contrast to tender squash slices. The method is straightforward: thinly slice the squash, toss it in a garlicky milk mixture, layer it into a casserole, and finish with a golden breadcrumb-Parmesan crust. It’s easy to scale up for a holiday table or halve for two.
Why this version works
Replacing cream with 2% milk reduces fat while still providing creaminess when combined with the starch in the squash and the richness of Parmesan. Fresh thyme and shallot add aromatic brightness, and the breadcrumb topping adds texture so every bite feels indulgent even though the recipe is lighter. If you don’t have butternut squash, a similar winter squash—like acorn or kabocha—can be substituted, though cooking times may vary slightly.
Quick tip for slicing
The easiest way to get even, thin slices is with a mandoline or a vegetable slicer designed for firm squash. If you prefer, a sharp chef’s knife works fine—just take care to cut uniform slices about 1/4 inch thick so they cook evenly. If you have a spiralizer or vegetable slicer, it can speed up the prep and produce consistent pieces for a more uniform bake.
Related recipe ideas
- Classic Scalloped Potato Au Gratin (a traditional potato version)
- Spinach Gratin (cheesy, savory greens)
- Brussels Sprouts Gratin (roasted sprouts with a crunchy topping)
- Winter Veggie Gratin (a seasonal mix of root vegetables)
Butternut Squash Gratin — Recipe
A lighter gratin that keeps the rich, cheesy flavor while using milk instead of cream. Serves 6 as a side.
Yield: 6 servings
Prep: 10 mins Cook: 50 mins Total: 1 hr
Calories: 161 kcal per serving
Ingredients
- 2 pound (about 1 medium) butternut squash, peeled and sliced 1/4 inch thick
- 1/2 cup 2% reduced-fat milk
- 2 garlic cloves, minced
- 1 small shallot, minced
- 1 tablespoon fresh thyme, chopped
- 1/3 cup freshly grated Parmesan cheese, divided
- 3/4 teaspoon kosher salt, divided
- Freshly ground black pepper, to taste
- Cooking spray (or a light brushing of oil)
- 2 tablespoons unsalted butter
- 1/2 cup whole wheat or gluten-free panko breadcrumbs
Instructions
- Preheat the oven to 400°F (200°C).
- Slice the peeled butternut squash into uniform 1/4-inch thick slices. Even thickness ensures consistent cooking; use a mandoline or slicer if available for best results.
- In a large bowl, combine the milk, minced garlic, minced shallot, chopped thyme, half of the Parmesan, 1/2 teaspoon of the salt, and a few grinds of black pepper. Add the squash slices and toss gently to coat them evenly in the mixture.
- Spray a medium oven-safe casserole dish with cooking spray (or lightly brush with oil). Arrange the coated squash slices in the dish, layering as needed but keeping the pieces relatively flat so they cook through evenly.
- In a separate bowl, melt the butter (microwave or stovetop). Stir in the panko, remaining Parmesan, 1/4 teaspoon salt, and additional pepper to taste. Mix until the crumbs are evenly coated and fragrant.
- Evenly spread the breadcrumb-Parmesan mixture over the top of the squash. Cover the dish with foil and bake for about 45 minutes, until the squash is tender when pierced with a knife.
- Remove the foil and place the dish under the broiler for 2 to 3 minutes to brown and crisp the topping—watch closely, as breadcrumbs can brown quickly.
- Let the gratin rest a few minutes before serving so it sets slightly and slices hold their shape.
Nutrition highlights (per serving)
- Calories: 161 kcal
- Carbohydrates: 24 g
- Protein: 5 g
- Fat: 6 g
- Fiber: 3.5 g
- Sodium: 250 mg
Last step: If you try this gratin, consider leaving a rating or a short comment to share how it turned out and any tweaks you made—notes from cooks help others adapt the recipe to their taste.
