Indulge in the creamy, cheesy layers of scalloped sweet potatoes—a sophisticated twist on a classic comfort dish that's perfect for the holidays or any special gathering. This recipe combines velvety sliced sweet potatoes with a luscious garlic-infused cream sauce, flavored with thyme and baked to perfection under a golden blanket of Gruyère and Parmesan cheeses. Each bite delivers a harmonious balance of sweetness, creaminess, and a hint of savory, making it an irresistible centerpiece or side dish. Easily prepped in just 20 minutes and baked to bubbly perfection, this elegant gratin is as easy to make as it is impressive to serve. Whether you're hosting Thanksgiving or looking for a crowd-pleasing addition to your weeknight menu, scalloped sweet potatoes are sure to delight.
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Preheat your oven to 375°F (190°C) and grease a 9x13-inch baking dish with butter or cooking spray.
Peel the sweet potatoes and slice them into thin rounds, about 1/8-inch thick. Use a mandoline slicer for uniform slices if possible.
In a medium saucepan over medium heat, melt the butter. Add the minced garlic and cook for 1 minute, until fragrant.
Whisk in the flour, stirring constantly, and cook for 1-2 minutes to form a roux.
Gradually pour in the milk and heavy cream, continuing to whisk until the mixture is smooth and begins to thicken, about 3-4 minutes.
Stir in the salt, black pepper, and thyme, then remove the saucepan from heat.
Spread a thin layer of the sauce on the bottom of the prepared baking dish. Arrange one-third of the sliced sweet potatoes in an even layer over the sauce.
Pour about one-third of the remaining sauce over the sweet potatoes, then sprinkle one-third of the Gruyère and Parmesan cheeses on top.
Repeat the layering process two more times, finishing with the remaining sauce and cheeses on top.
Cover the dish with aluminum foil and bake in the preheated oven for 40 minutes.
Remove the foil and continue baking for an additional 15-20 minutes, or until the sweet potatoes are tender and the top is golden and bubbly.
Let the scalloped sweet potatoes rest for 10 minutes before serving. Garnish with fresh thyme if desired.
Serving size | (1557.5g) |
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Amount per serving | % Daily Value* |
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Calories | 2792.7 |
Total Fat 196.5g | 0% |
Saturated Fat 120.3g | 0% |
Polyunsaturated Fat 1.6g | |
Cholesterol 617.3mg | 0% |
Sodium 5025.1mg | 0% |
Total Carbohydrate 153.2g | 0% |
Dietary Fiber 17.7g | 0% |
Total Sugars 48.2g | |
Protein 91.5g | 0% |
Vitamin D 257.4IU | 0% |
Calcium 2765.0mg | 0% |
Iron 6.8mg | 0% |
Potassium 943.5mg | 0% |
Source of Calories