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Sweet Potatoes Au Gratin Recipe

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3.9 from 62 reviews

  • Author: Amelia
  • Total Time: 1 hour 15 minutes
  • Yield: 6 servings
  • Diet: Vegetarian

Description

Sweet Potatoes Au Gratin is a comforting side dish featuring layers of thinly sliced sweet potatoes baked in a rich, creamy garlic sauce topped with melted gruyere and parmesan cheeses. This creamy, cheesy twist on the classic au gratin delivers a perfect balance of savory and sweet flavors, ideal for holiday dinners or family meals.

Ingredients

Sweet Potatoes

  • 3–4 medium sweet potatoes, thinly sliced

Cream Sauce

  • 1 cup heavy cream
  • 2 cloves garlic, minced
  • 1 tsp thyme
  • Salt and pepper, to taste

Cheese Topping

  • 1 cup shredded gruyere or cheddar cheese
  • 1/2 cup parmesan cheese

Optional

  • Breadcrumbs for topping

Instructions

  1. Preheat Oven and Prepare Dish: Preheat your oven to 375°F (190°C). Lightly grease a baking dish with butter or cooking spray to prevent sticking.
  2. Layer Sweet Potatoes: Arrange the thinly sliced sweet potatoes evenly in the prepared baking dish, creating an overlapping layered effect.
  3. Make Cream Sauce: In a bowl, combine the heavy cream, minced garlic, thyme, salt, and pepper. Whisk thoroughly to infuse the flavors and season to taste.
  4. Pour Cream Over Potatoes: Evenly pour the cream mixture over the layered sweet potatoes, ensuring all slices are coated to achieve a creamy texture.
  5. Add Cheese Topping: Sprinkle the shredded gruyere (or cheddar) and parmesan cheese evenly over the top of the dish for a golden, cheesy crust.
  6. Cover and Bake: Cover the baking dish tightly with aluminum foil and bake in the preheated oven for 40 minutes to let the potatoes soften and absorb the flavors.
  7. Uncover and Finish Baking: Remove the foil and bake for an additional 15 to 20 minutes, or until the top is golden brown and bubbly, signaling the dish is ready.

Notes

  • Add caramelized onions for extra sweetness and depth of flavor.
  • Use a mandoline slicer for uniformly thin slices that cook evenly.
  • Substitute gruyere with cheddar for a sharper taste or adjust cheese types to preference.
  • Breadcrumbs can be added on top before the final bake for added texture.
  • Prep Time: 15 minutes
  • Cook Time: 1 hour
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American

Find it online: https://justsosweet.com/sweet-potatoes-au-gratin-recipe/