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Sweet-Potato Gratins

These individual sweet potato gratins offer a sophisticated twist on a classic comfort food favourite. By layering thinly sliced sweet potatoes and white potatoes with rich double cream and a hint of nutmeg, you create a beautifully textured side dish that looks elegant on any plate. The addition of nutty Gruyère cheese provides a savoury, golden topping that balances the natural sweetness of the potatoes perfectly.

This vegetarian recipe is an excellent choice for Sunday roasts or festive dinner parties, providing a portion-controlled alternative to a large traybake. Baking them in a muffin tin ensures every guest receives those delicious crispy edges and a soft, creamy centre. Serve these alongside roasted seasonal vegetables or a crisp green salad for a satisfying and indulgent homemade meal.

Continue reading below

Ingredients for Sweet-Potato Gratins

  • 1 tablespoon unsalted butter, at room temperature

  • 2 large sweet potatoes, peeled and thinly sliced (use a sharp knife, a mandoline, or a food processor with the slicing disc attached)

  • 1/2 large Idaho potato, peeled and thinly sliced

  • 240ml double cream

  • 1 pinch ground nutmeg

  • 1 pinch freshly ground black pepper

  • Kosher salt to taste

  • 90g Gruyère, grated (about 240ml )

How to make Sweet-Potato Gratins

  1. Preheat oven to 204°C. With the butter, grease a 12-capacity muffin pan.

  2. In a large bowl, toss together the sweet potatoes, Idaho potato, cream, nutmeg, pepper, and salt.

  3. Layer the potato slices in each muffin cup until 3/4 full, then top off the muffin cups with any remaining cream. Sprinkle each gratin with some of the cheese. Cover the pan loosely with tinfoil and bake for 20 minutes.

  4. Remove the tinfoil and continue to bake until the potatoes are fork-tender and the cheese is golden brown, 10 to 15 minutes more. Remove and let cool for 5 minutes before serving.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 17 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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