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Creamy Sweet Potato Gratin

A rich and creamy sweet potato gratin that dazzles at dinner parties while being easy enough for weeknight meals.
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Prep Time 30 minutes
Cook Time 45 minutes
Total Time 1 hour 15 minutes
Servings: 8 servings
Course: Side Dish, Vegetarian
Cuisine: American, Comfort Food
Calories: 360
Ingredients Method Notes

Ingredients
  

Main ingredients
  • 2 pounds sweet potatoes, peeled and sliced thin A mandoline works wonders here!
  • 1 cup heavy cream
  • 1 cup milk
  • 2 cups shredded Gruyère cheese Because cheese makes everything better
  • 1/2 cup grated Parmesan cheese
  • 2 cloves garlic, minced
  • 1 teaspoon thyme leaves Or more if you love the flavor
  • to taste Salt
  • to taste Pepper
  • 1/2 cup breadcrumbs For that addictive crunch on top

Method
 

Preparation
  1. Preheat your oven to 375°F.
  2. In a greased baking dish, spread half of the sliced sweet potatoes evenly.
  3. In a saucepan over medium heat, combine the heavy cream, milk, minced garlic, thyme, salt, and pepper. Heat through but do not boil. Whisk in half of the Gruyère and Parmesan until smooth.
  4. Pour half of the creamy mixture over the first layer of sweet potatoes. Layer the remaining sweet potatoes and pour the rest of the cream mixture on top.
  5. Sprinkle the remaining Gruyère cheese and breadcrumbs over the top.
  6. Bake for about 45 minutes, covering with foil if the top browns too quickly.
  7. Let it rest for about 10 minutes before serving.

Notes

Prep ahead by slicing sweet potatoes the night before and storing in water. Cheese alternatives can include cheddar or mozzarella. If the sauce looks a bit lumpy, don't worry; it adds to the creaminess!