This creamy Sweet Potato Gratin with Gruyère and Rosemary is a delightful dish that serves as a rich holiday side option. It features thinly sliced sweet potatoes layered with garlic-infused heavy cream, Gruyère cheese, and fresh herbs, creating a comforting and flavorful experience.
Perfect as a cheesy potato gratin or a layered potato casserole, this savory sweet potato dish is an ideal alternative to traditional sweet potato casseroles, ensuring a memorable addition to your holiday table.
Marvelous Layers of Sweet Potatoes

This dish brilliantly showcases the natural sweetness of root vegetables. Each slice of sweet potato presents a delightful contrast against its rich, creamy backdrop.
By layering thinly sliced sweet potatoes, you allow for even cooking and enhance the overall flavor as they absorb the creamy, herb-infused mixture. The vibrant orange of the sweet potatoes adds a pop of color, elevating the visual appeal of this savory sweet potato dish.
Decadent Gruyère Cheese
The addition of Gruyère cheese infuses the gratin with a luxurious creaminess and a subtle nuttiness. As it bakes, the cheese melts into every crevice, creating a unified flavor profile that beautifully complements the sweet potatoes.
Its rich texture melts perfectly, allowing for that desirable golden, bubbly crust that tops the delicious creamy sweet potato bake. This cheesy potato gratin transforms a simple side dish into an exceptional centerpiece on your holiday table.
Aromatic Herb Infusion
Fresh rosemary is a cornerstone of this dish, adding an aromatic layer that enhances the overall depth of flavor. Its fragrance fills the kitchen, inviting everyone to gather around the table.
This herb pairs wonderfully with the creamy texture and sweet flavor of the potatoes, ensuring each bite is a melding of earthy and rich undertones. Incorporating rosemary creates an inviting atmosphere, perfect for celebrating with loved ones.
The Baking Process

Root vegetables and herbs require mindful preparation, and this recipe is no exception. Beginning with preheating the oven, creating the ideal temperature helps produce that coveted golden-brown crust.
As the gratin bakes, the layers meld harmoniously. Covering it initially with foil allows it to steam and soften, while the final uncovered baking time lets the top crisp up beautifully. This careful balance ensures the sweet potato slices are tender while the top remains crisp and inviting.
Serving and Presentation
Once baked to perfection, let the gratin rest for a few minutes before serving. This patience allows the layers to set, making it easier to slice and serve.
For an added touch, garnish with fresh rosemary sprigs as a delightful contrast to the cheesy topping. Presenting this baked sweet potato side in a rustic dish accentuates its cozy, comforting essence, perfect for a festive gathering.
An Unforgettable Holiday Side
This Sweet Potato Gratin with Gruyère and Rosemary is not just a dish; it’s an experience that celebrates warmth and togetherness during the holiday season. Ideal as a rich holiday side dish or a comforting addition to any meal, it’s sure to impress your guests.
Whether enjoying it at a family gathering or a festive dinner party, this layered potato casserole promises to leave a lasting impression. Each forkful encapsulates comfort, making it an essential recipe to have on hand when celebrating with loved ones.
Creamy Sweet Potato Gratin Recipe

This baked sweet potato side features tender sweet potato slices enveloped in a creamy, herb-infused mixture that bakes to golden perfection. The cooking process takes approximately 50-60 minutes and serves 6 people.
Ingredients
- 2 large sweet potatoes, thinly sliced
- 2 cups heavy cream
- 1 cup Gruyère cheese, grated
- 2 cloves garlic, minced
- 1 tablespoon fresh rosemary, chopped
- 1 teaspoon salt, adjust to taste
- 1/2 teaspoon black pepper
- 1/4 teaspoon nutmeg (optional)
- 2 tablespoons butter, for greasing the baking dish
Instructions
- Prep the Oven: Preheat your oven to 375°F (190°C) and grease a baking dish with butter.
- Prepare the Cream Mixture: In a bowl, combine the heavy cream, minced garlic, chopped rosemary, salt, pepper, and nutmeg, if using.
- Layer the Potatoes: Arrange half of the sweet potato slices in the greased baking dish. Pour half of the cream mixture over the first layer, then sprinkle half of the grated Gruyère cheese.
- Add More Layers: Repeat the layering process with the remaining sweet potatoes, cream mixture, and Gruyère cheese.
- Bake the Gratin: Cover the dish with aluminum foil and bake for 30 minutes. Then remove the foil and bake for an additional 20-30 minutes, or until the potatoes are tender and the top is golden and bubbly.
- Serve: Once done, allow it to cool for a few minutes before serving. Enjoy your creamy sweet potato gratin as a delightful side dish.
Cook and Prep Times
- Prep Time: 20 minutes
- Cook Time: 50-60 minutes
- Total Time: 70-80 minutes
Nutrition Information
- Servings: 6 servings
- Calories: 380kcal
- Fat: 27g
- Protein: 7g
- Carbohydrates: 33g

