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Sweet Potato Gratin

Sweet Potato Gratin is a comforting and indulgent dish that layers thinly sliced sweet potatoes with a creamy sauce, topped with a golden, crispy cheese layer. This delicious gratin is perfect as a side dish for any occasion, bringing a delightful sweetness and richness to your meal.
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Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Course Side Dish
Cuisine French
Servings 4 People
Calories 250 kcal

Equipment

  • 1 mixing bowl
  • 1 mandoline or sharp knife
  • 1 2-quart baking dish
  • 1 medium saucepan
  • 1 whisk
  • 1 oven mitts
  • 1 grater for cheese

Ingredients
  

  • 4 medium sweet potatoes about 2 pounds, peeled
  • 2 cups heavy cream
  • 1 cup grated Gruyère cheese
  • 1 cup grated Parmesan cheese
  • 2 cloves garlic minced
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • ¼ teaspoon nutmeg
  • 2 tablespoons unsalted butter for greasing the baking dish
  • optional Fresh thyme for garnish

Instructions
 

  • Preheat the oven to 350°F (175°C).
  • Grease the baking dish with unsalted butter.
  • Slice the sweet potatoes into thin rounds (about ⅛ inch thick) using a mandoline or sharp knife.
  • In a medium saucepan, combine the heavy cream, minced garlic, salt, black pepper, and nutmeg. Heat over medium-low, stirring until warmed but not boiling. Remove from heat.
  • Begin layering the sweet potato slices in the greased baking dish. Pour a portion of the cream mixture over the first layer.
  • Sprinkle a portion of the Gruyère and Parmesan cheese over the cream.
  • Continue layering the sweet potatoes, cream, and cheese until all ingredients are used, finishing with a layer of cheese on top.
  • Cover the baking dish with aluminum foil and bake in the preheated oven for 30 minutes.
  • Remove the foil and bake for an additional 15 minutes, or until the top is golden brown and bubbly.
  • Let the gratin cool for a few minutes before serving. Garnish with fresh thyme if desired.
  • For a twist, try adding sautéed onions or bacon for extra flavor.
  • You can prepare the gratin in advance and bake it just before serving.
  • The gratin is best enjoyed fresh but can be stored in the refrigerator for up to 3 days. Reheat in the oven to restore the texture.

Notes

For a twist, try adding sautéed onions or bacon for extra flavor.
You can prepare the gratin in advance and bake it just before serving.
The gratin is best enjoyed fresh but can be stored in the refrigerator for up to 3 days. Reheat in the oven to restore the texture.