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Sweet Potatoes Au Gratin Recipe

Looking for a delicious side dish? Try this sweet and savory Sweet Potatoes Au Gratin Recipe!
Course Appetizer, dinner, lunch, side, Side Dish
Cuisine American
Prep Time 20 minutes
Cook Time 1 hour 5 minutes
Servings 6
Calories 192kcal


  • 1 small diced yellow onion
  • 1 peeled and thinly sliced russet potato
  • 1 peeled and thinly slice sweet potato
  • 1 tablespoon of unsalted butter
  • 2 tablespoons of flour
  • 1 ½ cups of milk
  • 2 ounces of shredded Gruyere cheese
  • 1/2 cup of breadcrumbs
  • 1 teaspoon of chopped fresh thyme
  • 1 teaspoon of chopped fresh rosemary
  • Kosher salt and fresh cracked pepper to taste


  • In a medium sized pot on high heat with 1 teaspoon of butter add in the onions and caramelize. Once they are brown add in the remaining amount of butter.
  • Once the butter has melted add in the flour and stir until combined to make a roux. Pour in the milk and bring to a slow boil. The milk should become very thick.
  • Next, whisk in the gruyere cheese, season with salt and pepper and in the herbs.
  • Mix in the sliced potatoes to the pot and transfer to a small baking dish. Top off with the bread crumbs and any leftover shredded gruyere cheese.
  • Bake on 375° for 60 minutes or until browned on top.


Calories: 192kcal | Carbohydrates: 24g | Protein: 8g | Fat: 7g | Saturated Fat: 4g | Cholesterol: 22mg | Sodium: 155mg | Potassium: 354mg | Fiber: 2g | Sugar: 6g | Vitamin A: 3335IU | Vitamin C: 4.5mg | Calcium: 196mg | Iron: 1.1mg