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Sweet Potato Gratin

Sweet Potato Gratin

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Sweet Potato Gratin is a savory dish featuring thinly sliced sweet potatoes baked in a creamy sauce, often topped with cheese or breadcrumbs for a golden crust. It’s a comforting side dish perfect for holidays or family meals.

Ingredients

Scale
  • 2 pounds sweet potatoes, peeled and thinly sliced
  • 1 tablespoon olive oil
  • 1 onion, thinly sliced
  • 2 cloves garlic, minced
  • 2 cups heavy cream
  • 1/2 cup vegetable broth
  • 1 teaspoon fresh thyme leaves, chopped
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1 cup grated Gruyere cheese (or other good melting cheese)
  • 1/4 cup breadcrumbs (optional, for topping)

Instructions

  1. Preheat oven to 375°F (190°C). Lightly grease a 9×13 inch baking dish.
  2. In a large skillet over medium heat, warm the olive oil. Add the sliced onion and cook until softened, about 5-7 minutes. Add the minced garlic and cook for another minute until fragrant.
  3. Stir in the heavy cream, vegetable broth, thyme, salt, and pepper. Bring to a gentle simmer, then remove from heat.
  4. Arrange half of the sliced sweet potatoes in an even layer in the prepared baking dish. Pour half of the cream mixture over the sweet potatoes. Sprinkle with half of the grated cheese.
  5. Repeat with the remaining sweet potatoes, cream mixture, and cheese. If desired, sprinkle breadcrumbs over the top for extra crispiness.
  6. Cover the baking dish with foil and bake for 30 minutes.
  7. Remove the foil and continue to bake for another 20-30 minutes, or until the sweet potatoes are tender and the top is golden brown and bubbly.
  8. Let the gratin rest for 10 minutes before serving.

Notes

  • For a richer flavor, you can infuse the cream with a bay leaf before adding it to the gratin. Remove the bay leaf before pouring over the sweet potatoes.
  • If you prefer a spicier kick, add a pinch of cayenne pepper to the cream mixture.
  • Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven or microwave.
  • You can prepare this dish ahead of time and refrigerate it before baking. Add an extra 10-15 minutes to the baking time if baking from cold.

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