Sweet Potato Gratin for Two

Name: Sweet Potato Gratin for Two
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Yield: 2 servings
Ingredients: 2 medium sweet potatoes, peeled and thinly sliced; 1 cup heavy cream; 1 cup grated Gruyère cheese; 1/2 cup grated Parmesan cheese; 2 cloves garlic, minced; 1 tsp fresh thyme leaves; Salt and pepper, to taste; 1/2 cup breadcrumbs (for topping); 2 tbsp unsalted butter, melted

Highlighted under: Baking & Desserts

I absolutely love making Sweet Potato Gratin for two when I want to indulge in a comforting yet elegant dish. The layers of creamy sweet potatoes combined with rich cheeses create a delightful harmony of flavors that warms the heart. I usually save it for special occasions or cozy date nights, as it is both impressive and easy to prepare. The crunchy topping adds the perfect texture that contrasts beautifully with the tender sweet potatoes, making each bite a celebration of taste.

Created by

Camilla Rhodes

Last updated on 2026-01-07T15:07:14.837Z

When I first made this Sweet Potato Gratin, I was amazed at how easy it was to create such a sophisticated dish. I opted for thinly sliced sweet potatoes, which not only made layering seamless but also ensured that each slice cooked evenly. Using a combination of Gruyère and Parmesan cheese provided a rich, nutty flavor that elevated the gratin beyond the ordinary.

One of my favorite tips is to add a sprinkle of fresh thyme or rosemary between the layers. It adds an aromatic depth that complements the sweetness of the potatoes perfectly. I always serve this dish straight from the oven, allowing the creamy top to bubble attractively before my guests dig in!

        Why You'll Love This Recipe
        Creamy layers of sweet potato that melt in your mouth
Crunchy topping provides the perfect textural contrast
Simple to make but looks gourmet on the table

      

The Role of Ingredients

Each ingredient in this Sweet Potato Gratin plays a critical role in achieving its creamy, rich texture and flavor. The sweet potatoes themselves should be medium-sized, fresh, and firm to ensure that they cook evenly. Thinly slicing them allows for quicker cooking and better layering, ensuring every bite is consistent. I recommend a mandoline for precision in slicing—this not only enhances presentation but also improves textural contrast of the finished dish.

The combination of cheeses is essential for depth of flavor. Gruyère adds nuttiness and a creamy melt, while Parmesan contributes a sharp kick and a slightly crunchy texture when baked. If you can't find Gruyère, Swiss cheese can be a good substitute, but be mindful that it will alter the flavor profile slightly. For a vegan version, consider using cashew cream in place of heavy cream and a blend of nutritional yeast and vegan cheese for the topping.

Perfecting Your Technique

Layering is key to a well-cooked gratin. Make sure to season every layer of sweet potatoes with salt and pepper, as this enhances their natural sweetness. If you want an extra depth of flavor, consider adding a pinch of nutmeg or a splash of white wine along with the cream. The baking process is also crucial; cover the dish for the first half to ensure the sweet potatoes steam and soften adequately, then remove the foil to allow the topping to achieve that coveted golden brown color and crispy texture.

If you're serving it for a special occasion, try to allow the gratin to rest for about 10 minutes after baking. This resting period helps the layers set, making it easier to serve while still maintaining that creamy interior. If you notice your gratin is bubbling over the edges, placing it on a baking sheet can help catch any spills, preventing messes in the oven.

Ingredients

Gratin Ingredients

2 medium sweet potatoes, peeled and thinly sliced
1 cup heavy cream
1 cup grated Gruyère cheese
1/2 cup grated Parmesan cheese
2 cloves garlic, minced
1 tsp fresh thyme leaves
Salt and pepper, to taste
1/2 cup breadcrumbs (for topping)
2 tbsp unsalted butter, melted

Instructions

Prepare the oven and dish

Preheat your oven to 375°F (190°C). Grease a small baking dish or individual ramekins with butter.

Layer the sweet potatoes

Begin layering the sliced sweet potatoes in the baking dish. Sprinkle each layer with salt, pepper, garlic, and thyme for added flavor.

Add the cream and cheese

Pour the heavy cream over the sweet potatoes, ensuring that all slices are submerged. Then sprinkle Gruyère and Parmesan cheese evenly on top.

Prepare the topping

In a bowl, mix the breadcrumbs with melted butter. Sprinkle this mixture over the cheese layer for a crunchy topping.

Bake the gratin

Cover the dish with aluminum foil and bake for 30 minutes. Then, remove the foil and bake for an additional 15 minutes, or until the top is golden brown and the sweet potatoes are tender.

Serve and enjoy

Allow the gratin to rest for a few minutes before serving. Enjoy it warm as a lovely side dish or a cozy main course!

Pro Tips

For a kick of flavor, try adding a dash of nutmeg or a pinch of cayenne pepper in the cream mix. These spices complement the sweet potatoes beautifully.

Storage and Make-Ahead Tips

You can prepare this Sweet Potato Gratin a day in advance, which makes it a perfect option for busy days or entertaining. Assemble the dish, cover it tightly with plastic wrap, and store it in the refrigerator. When ready to bake, remove the wrap, let it sit at room temperature for about 30 minutes, and then bake according to the instructions. This not only allows for flavors to meld but also ensures thorough cooking.

Leftovers can be stored in an airtight container in the refrigerator for up to three days. When reheating, cover the dish with foil to prevent the top from over-browning while the insides warm through. It can also be gently reheated in the oven or microwave, though the oven will yield the best texture, making the top crispy again.

Serving Suggestions

Sweet Potato Gratin makes for an excellent main or side dish, pairing beautifully with roasted meats or a fresh green salad. For a cozy meal, enjoy it alongside a warm bowl of soup, like butternut squash or tomato bisque, which complements the sweetness of the gratin wonderfully. Consider topping it with chopped fresh herbs like parsley or chives for a pop of color and freshness before serving.

For a fun twist, you could incorporate different vegetables into the layers, such as thinly sliced zucchini or even parsnips, which offer a nice contrast. You might also experiment with different cheeses, such as goat cheese for a tangy flavor, or smoked cheese for a unique taste profile. Each variation adds a personal touch while keeping the essence of this delightful dish intact.

Questions About Recipes

→ Can I make this gratin ahead of time?

Yes! You can prepare the gratin a day in advance and refrigerate it. Just bake it when you're ready to serve.

→ What can I substitute for Gruyère cheese?

You can use Emmental or even a sharp cheddar in place of Gruyère if you'd like a different flavor.

→ How do I store leftovers?

Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven to maintain the texture.

→ Can I add vegetables to this gratin?

Absolutely! Feel free to mix in thinly sliced onions or spinach for added flavor and nutrition.