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Sweet Potato Gratin

This Sweet Potato Gratin is a delightful dish that combines the natural sweetness of sweet potatoes with creamy cheese and herbs. Perfect as a side for holiday meals or a comforting dinner.
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Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Course Side Dish
Cuisine American
Servings 4 People
Calories 220 kcal

Equipment

  • 1 9x13 inch baking dish
  • 1 mandoline or sharp knife
  • 1 mixing bowl
  • 1 whisk
  • 1 measuring cups and spoons
  • 1 grater for cheese

Ingredients
  

  • 2 pounds sweet potatoes, peeled and thinly sliced
  • 1 cup heavy cream
  • 1 cup whole milk
  • 2 cups shredded Gruyère cheese (or cheddar)
  • 2 tablespoons unsalted butter Use 1 tablespoon for greasing and 1 tablespoon cut into small pieces for topping.
  • 2 cloves garlic, minced
  • 1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • ¼ teaspoon nutmeg (optional)
  • ½ cup grated Parmesan cheese (for topping)

Instructions
 

  • Preheat your oven to 375°F (190°C).
  • In a mixing bowl, whisk together the heavy cream, milk, minced garlic, thyme, salt, black pepper, and nutmeg until well combined.
  • Grease the baking dish with 1 tablespoon of butter.
  • Layer half of the sweet potato slices in the baking dish, slightly overlapping the pieces.
  • Pour half of the cream mixture over the first layer of sweet potatoes, followed by half of the Gruyère cheese.
  • Repeat the layering process with the remaining sweet potatoes, cream mixture, and Gruyère cheese.
  • Top the final layer with grated Parmesan cheese and the remaining tablespoon of butter, cut into small pieces.
  • Cover the 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 bubbly and golden brown.
  • Let the gratin cool for a few minutes before serving.

Notes

For a more savory flavor, you can add caramelized onions or cooked bacon between the layers.
This dish can be prepared ahead of time and baked just before serving; simply cover and refrigerate, then increase baking time by 10-15 minutes.
Enjoy the gratin as a side dish for roasted meats or as part of a vegetarian meal.