If there is one side dish that instantly transforms a dinner into something warm, cozy, and comforting, it’s a gratin. And this Butternut Squash Gratin is everything a gratin should be: creamy, cheesy, golden, and full of deep, rich flavor. Whether you’re preparing a holiday feast, a cozy fall dinner, or simply want to elevate your weekly meals, this gratin is the perfect dish to bring to the table.

Butternut squash is naturally sweet, buttery, and velvety, and when layered with garlic-infused cream, parmesan cheese, herbs, and a crispy breadcrumb topping, it becomes a luxurious side dish that pairs beautifully with almost any main course. Even better, it’s easy to make — just slice, layer, pour, bake, and enjoy.

This dish feels elegant enough for celebrations, yet simple enough for everyday meals. It delivers comfort in every bite while staying fresh and bright thanks to the natural sweetness of the squash.

⭐ Why You’ll Love This Recipe

• Creamy, cheesy, and comforting
• Perfect for fall and winter
• A holiday-worthy side dish
• Simple ingredients with huge flavor
• Easy to assemble
• Golden, crispy, bubbly top
• Works with fresh or pre-cut butternut squash

If you love scalloped potatoes or potato gratin, this butternut squash version is even more flavorful and seasonal.

⭐ Ingredients You’ll Need

Butternut Squash

Use fresh peeled and sliced squash or high-quality pre-cut cubes for convenience.

Heavy Cream

Creates the rich, velvety sauce that coats the squash.

Garlic

Infuses the cream mixture with incredible aroma and depth.

Parmesan Cheese

Adds salty richness and melts beautifully throughout the dish.

Thyme

Brings fresh herbal flavor that pairs perfectly with squash.

Butter

Used for the topping and flavor.

Breadcrumbs

Creates the crispy, golden top you expect in a good gratin.

Salt & Pepper

Enhances and balances all flavors.

⭐ How to Make Butternut Squash Gratin

1. Prep the Squash

Slice the squash into thin, even rounds or small cubes. Thin slices cook faster, but cubes also work well if that’s what you have.

2. Make the Cream Mixture

Heat heavy cream, garlic, thyme, salt, and pepper until warm and fragrant. This helps the flavors meld and infuses the entire dish.

3. Layer the Gratin

Add squash to a baking dish, pour the cream mixture over it, and add parmesan between layers for maximum flavor.

4. Add the Topping

Combine breadcrumbs, parmesan, melted butter, and black pepper. Sprinkle generously over the top.

5. Bake Until Golden

Bake until squash is tender and the top is golden, crisp, and bubbling — usually about 35–45 minutes depending on thickness.

6. Let Rest

Let the gratin sit for 5–10 minutes so the sauce thickens and sets.

Butternut Squash Gratin

Creamy, cheesy butternut squash baked with garlic, parmesan, and a golden breadcrumb topping. The ultimate cozy fall and holiday side dish.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 40 minutes mins

Total Time 55 minutes mins

Servings: 6 servings

Course: Casserole, Side Dish

Cuisine: American

Calories: 295

Ingredients Equipment Method Notes

Ingredients

  

Gratin Base

• 3 lbs butternut squash peeled and sliced thin
• 1 cup heavy cream
• 3 cloves garlic minced
• 1 tsp salt
• 0.5 tsp black pepper
• 1 tsp thyme fresh leaves
• 1 cup parmesan cheese grated, divided

Topping

• 0.5 cup breadcrumbs
• 3 tbsp butter melted
• black pepper to taste

Equipment

• Baking dish
• Saucepan
• Knife
• Mixing bowl

Method

 

1. Preheat oven to 400°F (200°C).
2. Warm cream with garlic, salt, pepper, and thyme.
3. Layer squash in a baking dish, adding parmesan between layers.
4. Pour cream mixture over layered squash.
5. Mix breadcrumbs, melted butter, parmesan, and pepper.
6. Sprinkle topping over gratin.
7. Bake 35–45 minutes until golden and tender.
8. Let rest before serving.

Notes

Slice squash thinly for even cooking; rest before serving to thicken.

⭐ Tips for the Creamiest, Most Flavorful Gratin

• Slice squash thinly (⅛–¼ inch) for even cooking.
• Warm the cream first for deeper flavor.
• Add cheese between layers for extra richness.
• Use fresh parmesan — it melts better than pre-grated.
• Let it rest after baking so it thickens properly.

⭐ Variations

• Gruyère or cheddar gratin: Replace some parmesan with gruyère or sharp cheddar.
• Crispy bacon: Add crumbled cooked bacon to the layers.
• Nutmeg touch: Add a pinch of nutmeg to the cream for warmth.
• Panko topping: Use panko instead of regular breadcrumbs for extra crunch.
• Rosemary version: Replace thyme with rosemary for an earthy twist.

⭐ What to Serve With Butternut Squash Gratin

This gratin pairs beautifully with:

• Roasted chicken
• Turkey
• Steak or beef tenderloin
• Pork chops
• Ham
• Salmon
• Stuffed mushrooms
• Green beans or roasted Brussels sprouts

On a holiday table, it becomes a standout side dish next to stuffing, mashed potatoes, and casseroles.

⭐ How to Store & Reheat

• Fridge: Store 3–4 days
• Reheat oven: 350°F for 10–12 minutes
• Microwave: 1–2 minutes (softer top)
• Freezer: Freeze baked gratin for up to 2 months; thaw and re-bake

Ingredients (List Format)

• 3 lbs butternut squash, peeled and sliced thin
• 1 cup heavy cream
• 3 cloves garlic, minced
• 1 teaspoon salt
• ½ teaspoon black pepper
• 1 teaspoon fresh thyme leaves
• 1 cup grated parmesan cheese (divided)
• ½ cup breadcrumbs
• 3 tablespoons melted butter
• Extra black pepper for topping

Instructions (Numbered)

1. Preheat oven to 400°F (200°C).
2. Peel and slice butternut squash into thin rounds or small cubes.
3. Warm heavy cream with garlic, salt, pepper, and thyme in a saucepan.
4. Add a layer of squash to a baking dish and sprinkle with parmesan.
5. Continue layering until squash is used.
6. Pour the warm cream mixture over the layered squash.
7. Mix breadcrumbs, melted butter, remaining parmesan, and pepper.
8. Sprinkle topping evenly over the gratin.
9. Bake 35–45 minutes until golden and tender.
10. Let rest 5–10 minutes before serving.