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–+ servings
Sweet Potatoes Au Gratin

Au Gratin Sweet Potatoes

This comforting Sweet Potatoes Au Gratin recipe features creamy layers of sweet potatoes and cheese, perfect for family gatherings or special occasions.
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Prep Time 15 minutes
Cook Time 1 hour 15 minutes
Resting Time 10 minutes
Total Time 1 hour 30 minutes
Servings: 8 servings
Course: Dinner Recipes
Cuisine: American
Ingredients Equipment Method Nutrition Notes

Ingredients
  

  • 1 medium yellow onion sliced
  • 1 tbsp olive oil
  • 1 tbsp unsalted butter
  • 2 cloves garlic minced
  • 4 lbs sweet potatoes peeled and sliced thin (1/8 – 1/16 of an inch)
  • 1.5 cups heavy cream
  • 1.75 cups Gruyere cheese grated
  • 1 cup white cheddar cheese grated
  • 1 tbsp fresh thyme or 1 tsp dried flakes
  • 0.125 tsp fresh grated nutmeg
  • 1 tsp kosher salt
  • black pepper

Equipment

  • 9x13 baking dish
  • medium skillet
  • large bowl

Method
 

  1. Preheat oven to 350 degrees, and spray a 9×13 baking dish with nonstick cooking spray.
  2. Add olive oil, butter, and sliced onions to a medium skillet over medium heat. Season with a bit of salt and pepper. Sauté for about 5 minutes. Stir in minced garlic. Sauté for another 2-3 minutes until onions are translucent.
  3. In a large bowl combine the sliced sweet potatoes, heavy cream, thyme, nutmeg, kosher salt, and black pepper. Stir in sautéed onions, 1 cup of the Gruyere cheese, and the white cheddar cheese.
  4. Pour mixture into prepared baking dish, and arrange evenly, press down lightly. Top with remaining 3/4 cup of Gruyere cheese.
  5. Bake for 1 hour and 15 minutes until bubbly and golden brown on top.
  6. Allow to rest for about 10 minutes before serving.

Nutrition

Serving: 1serving

Notes

This dish is perfect for gatherings and can be customized by adding ingredients like crispy bacon or different varieties of cheese.

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