Easy Scalloped Sweet Potatoes Recipe – Delicious Side Dish

Posted on April 15, 2026

By: James Carter

There are certain dishes that just feel like home, and for me, these scalloped sweet potatoes are definitely one of them. They come together with a comforting creaminess that pairs wonderfully with so many meals, from a casual weeknight dinner to something a little more special. It’s a straightforward recipe that delivers on flavor without requiring advanced culinary skills.

Why This Scalloped Sweet Potatoes Recipe Works

This scalloped sweet potato recipe is a winner because it balances the natural sweetness of the potatoes with a rich, savory cream sauce. The layers of thinly sliced sweet potato cook down to a tender, melt-in-your-mouth consistency, absorbing all the delicious flavors from the sauce. It’s a familiar comfort food with a nutritious twist that appeals to both adults and kids.

Ingredients

  • 2 pounds sweet potatoes (about 3-4 medium), peeled and thinly sliced (about 1/8-inch thick)
  • 2 tablespoons unsalted butter
  • 1 medium yellow onion, thinly sliced
  • 2 cloves garlic, minced
  • 2 tablespoons all-purpose flour
  • 1 ½ cups whole milk
  • ½ cup heavy cream
  • ½ teaspoon salt, plus more to taste
  • ¼ teaspoon black pepper, plus more to taste
  • Pinch of nutmeg (optional, but recommended)
  • ½ cup shredded Gruyère cheese or sharp cheddar cheese (optional, for topping)
  • Fresh parsley, chopped, for garnish (optional)

Gathering these ingredients is the first step towards a truly satisfying side dish. I always try to pick sweet potatoes that are firm to the touch and have a vibrant, uniform color, as this often indicates good flavor and texture.

How to Make It

  1. Preheat your oven to 375°F (190°C). Lightly butter a 9×13 inch baking dish.
  2. In a large skillet or Dutch oven, melt the butter over medium heat. Add the thinly sliced onion and cook, stirring occasionally, until softened and translucent, about 5-7 minutes.
  3. Add the minced garlic to the skillet and cook for another minute until fragrant, being careful not to burn it.
  4. Sprinkle the flour over the onions and garlic. Stir well to coat and cook for 1-2 minutes, creating a roux. This helps to thicken the sauce.
  5. Gradually whisk in the milk, a little at a time, ensuring that each addition is incorporated before adding more. Continue whisking until the sauce is smooth.
  6. Stir in the heavy cream, salt, pepper, and nutmeg (if using). Bring the mixture to a gentle simmer, stirring constantly, until it begins to thicken. It should coat the back of a spoon nicely. If it seems too thick, you can add a splash more milk.
  7. Arrange half of the thinly sliced sweet potatoes in an even layer in the prepared baking dish.
  8. Pour about half of the cream sauce over the sweet potatoes.
  9. Layer the remaining sweet potatoes over the sauce.
  10. Pour the rest of the cream sauce evenly over the top layer of sweet potatoes, ensuring they are mostly submerged.
  11. If using cheese, sprinkle it evenly over the top of the casserole.
  12. Cover the baking dish tightly with aluminum foil.
  13. Bake for 45 minutes.
  14. Remove the foil and continue baking for another 15-20 minutes, or until the sweet potatoes are tender when pierced with a fork and the top is golden and bubbly. A thin knife or skewer should slide easily into the potatoes.
  15. Let the scalloped sweet potatoes rest for about 10 minutes before serving. This allows the sauce to set slightly.
  16. Garnish with fresh chopped parsley, if desired.

This step-by-step guide ensures that each element contributes to the final, harmonious dish. The initial sautéing of the onions and garlic builds a foundational flavor. Creating the roux with butter and flour is crucial for achieving that characteristic creamy texture without being gloopy or pasty.

Try this recipe too: Nourishing Honey Feta Sweet Potatoes

Nutrition at a Glance

  • Rich in Vitamin A (from sweet potatoes)
  • Good source of fiber
  • Provides carbohydrates for energy
  • Contains some protein and healthy fats (especially if using dairy)
  • Lower in sodium if you adjust the added salt

How to Serve It

  • As a comforting side dish for roasted chicken or turkey.
  • Paired with pork chops or grilled steaks for a hearty meal.
  • A vegetarian main course with a side salad.
  • Alongside a festive holiday spread.

These scalloped sweet potatoes are incredibly versatile and can elevate a wide range of main dishes. Their inherent sweetness and creamy texture make them a natural companion to savory proteins. nce.

Common Mistakes

  • Slicing Potatoes Too Thickly: This can lead to uneven cooking, with some slices remaining tough while others become mushy. Aim for consistent, thin slices for best results.
  • Not Enough Liquid: If the sauce is too scant, the potatoes may not cook through properly and the dish can become dry. Ensure the potatoes are well-covered by the sauce.
  • Burning the Garlic or Onions: Overcooking garlic or onions at any stage can impart a bitter flavor to the entire dish. Cook them until softened and fragrant, but avoid charring.
  • Skipping the Roux: Omitting the flour (or not cooking it long enough) means the sauce won’t thicken properly, resulting in a watery casserole.
  • Overcooking: While you want the potatoes tender, overbaking can make them excessively soft and break down, losing their distinct shape and texture.

Avoiding these common pitfalls ensures a more successful outcome. One frequent issue is with potato preparation: slicing them too thick is a recipe for uneven cooking disaster. I’ve learned over the years that a mandoline slicer, used with caution, can be a lifesaver for achieving that uniform 1/8-inch thickness that’s critical for even tenderness throughout the casserole.

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Storage and Reheating

  • Storage: Allow the casserole to cool completely before transferring it to an airtight container. Refrigerate for up to 3-4 days.
  • Reheating: For best results, reheat individual portions in the microwave for 1-2 minutes, or cover the baking dish with foil and reheat in a 350°F (175°C) oven for 15-20 minutes until heated through. You may need to add a splash of milk or cream if the casserole seems a bit dry after reheating.
  • Freezing: While not ideal as the texture can be compromised, you can freeze cooled, cooked scalloped sweet potatoes in an airtight container for up to 2-3 months. Thaw in the refrigerator overnight and reheat as above.

Proper storage and reheating are crucial for enjoying this dish at its best, even after the initial meal. After cooking, letting the scalloped sweet potatoes cool down completely is essential. This step helps to prevent condensation, which can make the dish watery. Once cooled, transferring the leftovers to an airtight container is your best bet for maintaining freshness.

Leftover Ideas

  • Sweet Potato Hash: Chop leftover scalloped sweet potatoes and sauté them with some onions, peppers, and perhaps some crumbled bacon or sausage for a delicious breakfast hash.
  • Sweet Potato Patties: Mash the leftovers, bind with an egg and a little flour or breadcrumbs, and pan-fry to create savory sweet potato patties.
  • As a Sandwich or Wrap Filling: Mash and spread the leftovers onto toast or into a wrap for a quick and flavorful lunch.
  • In a Shepherd’s Pie Topping: Use the mashed scalloped sweet potatoes as a creamy, slightly sweet topping for a savory ground meat or lentil filling.

Reimagining leftovers is one of my favorite parts of cooking. These scalloped sweet potatoes, once cooled, offer a fantastic starting point for entirely new meals. Imagine taking those tender, creamy slices and giving them a quick chop. Then, introducing them to a hot skillet with some diced onions, bell peppers, and maybe a few crumbles of breakfast sausage or crispy bacon.

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Scalloped Sweet Potatoes


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  • Author: James Carter
  • Total Time: 80 minutes
  • Yield: 8 servings 1x
  • Diet: Vegetarian

Description

A comforting and creamy scalloped sweet potato casserole, made with thinly sliced sweet potatoes baked in a rich, savory cream sauce. Easy to prepare and a delightful side dish for any meal.


Ingredients

Scale
  • 2 pounds sweet potatoes (about 34 medium), peeled and thinly sliced (about 1/8-inch thick)
  • 2 tablespoons unsalted butter
  • 1 medium yellow onion, thinly sliced
  • 2 cloves garlic, minced
  • 2 tablespoons all-purpose flour
  • 1 ½ cups whole milk
  • ½ cup heavy cream
  • ½ teaspoon salt, plus more to taste
  • ¼ teaspoon black pepper, plus more to taste
  • Pinch of nutmeg (optional, but recommended)
  • ½ cup shredded Gruyère cheese or sharp cheddar cheese (optional, for topping)
  • Fresh parsley, chopped, for garnish (optional)

Instructions

  1. 1. Preheat your oven to 375°F (190°C). Lightly butter a 9×13 inch baking dish.
  2. 2. In a large skillet or Dutch oven, melt the butter over medium heat. Add the thinly sliced onion and cook, stirring occasionally, until softened and translucent, about 5-7 minutes.
  3. 3. Add the minced garlic to the skillet and cook for another minute until fragrant, being careful not to burn it.
  4. 4. Sprinkle the flour over the onions and garlic. Stir well to coat and cook for 1-2 minutes, creating a roux. This helps to thicken the sauce.
  5. 5. Gradually whisk in the milk, a little at a time, ensuring that each addition is incorporated before adding more. Continue whisking until the sauce is smooth.
  6. 6. Stir in the heavy cream, salt, pepper, and nutmeg (if using). Bring the mixture to a gentle simmer, stirring constantly, until it begins to thicken. It should coat the back of a spoon nicely. If it seems too thick, you can add a splash more milk.
  7. 7. Arrange half of the thinly sliced sweet potatoes in an even layer in the prepared baking dish.
  8. 8. Pour about half of the cream sauce over the sweet potatoes.
  9. 9. Layer the remaining sweet potatoes over the sauce.
  10. 10. Pour the rest of the cream sauce evenly over the top layer of sweet potatoes, ensuring they are mostly submerged.
  11. 11. If using cheese, sprinkle it evenly over the top of the casserole.
  12. 12. Cover the baking dish tightly with aluminum foil.
  13. 13. Bake for 45 minutes.
  14. 14. Remove the foil and continue baking for another 15-20 minutes, or until the sweet potatoes are tender when pierced with a fork and the top is golden and bubbly.
  15. 15. Let the scalloped sweet potatoes rest for about 10 minutes before serving. This allows the sauce to set slightly.
  16. 16. Garnish with fresh chopped parsley, if desired.

Notes

Store cooled leftovers in an airtight container in the refrigerator for up to 3-4 days. Reheat in the oven or microwave. For best results, add a splash of milk or cream when reheating if it seems dry.

  • Prep Time: 20 minutes
  • Cook Time: 60 minutes
  • Category: Side Dish
  • Method: Baked
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 250
  • Sugar: 15g
  • Sodium: 300mg
  • Fat: 12g
  • Carbohydrates: 35g
  • Fiber: 5g
  • Protein: 4g

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