Sweet Potato and Gruyère Gratin

This creamy sweet potato and Gruyère gratin recipe is elevated with a Gruyère cheese sauce made with heavy cream, parsley, thyme, sage, and rosemary.

• Preparation Time: 30 mins
• Cooking Time: 50 mins
• Total Time: 1 hr 20 mins
• Calories: 248 Calories

Ingredients

• 2 cloves garlic, minced
• 1 tablespoon chopped fresh thyme
• 1 tablespoon chopped fresh parsley
• 1 tablespoon chopped fresh sage
• 1 tablespoon chopped fresh rosemary
• aluminum foil
• 3 pounds sweet potatoes, peeled and thinly sliced
• 1.5 teaspoons salt
• 0.75 cup milk
• 0.25 cup unsalted butter
• 0.75 teaspoon ground black pepper
• 1.5 cups shredded Gruyere cheese
• 0.75 cup whipping cream

Recipe Instructions

Step 1

Preheat the oven to 400 degrees F (200 degrees C). Lightly grease a 9x13-inch baking dish.

Step 2

Combine cream, milk, butter, and garlic in a small saucepan over medium heat; bring to a simmer. Off heat, stir in parsley, thyme, sage, rosemary, salt, and black pepper.

Step 3

Arrange ½ sweet potatoes in the bottom of the prepared baking dish, pour ½ cream mixture on top, sprinkle with ½ Gruyère cheese. Repeat layers once more; cover dish with aluminum foil.

Step 4

Bake in the preheated oven for 30 minutes. Remove foil; continue baking, uncovered, until potatoes are tender and cream mixture and cheese are bubbly and golden brown, about 15 minutes. Set aside before serving, 10 minutes.