I always look forward to Christmas dinner because of the incredible side dishes that bring everyone together. These Scalloped Sweet Potatoes are one of my favorite holiday traditions because they offer a beautiful balance of savory and sweet flavors. I love how the creamy sauce bubbles around the tender potato slices, creating a comfort food masterpiece that looks absolutely stunning on any festive table.

Recipe Details

Recipe Information

Prep Time: 20 minutes
Cook Time: 60 minutes
Total Time: 80 minutes
Servings: 8
Difficulty: Easy

Nutrition Information (Per Serving)

Calories: 285
Protein: 5g
Carbs: 32g
Fat: 16g

Why You’ll Love This Scalloped Sweet Potatoes

This dish is the ultimate holiday crowd pleaser because it transforms simple ingredients into something elegant and indulgent. Unlike a traditional sugary marshmallow casserole, this version focuses on a silky, garlic infused cream sauce that highlights the natural earthy sweetness of the potatoes. It provides a sophisticated alternative for your Christmas spread, offering a velvety texture that pairs perfectly with roasted meats. Plus, it is incredibly easy to scale up if you are hosting a large family gathering.

Scalloped Sweet Potatoes Ingredients & Substitutions

3 lbs sweet potatoes, peeled and sliced into 1/8 inch rounds
4 tablespoons butter
3 cloves garlic, minced
1/4 cup all purpose flour
1 1/2 cups whole milk
1 cup heavy cream
1 teaspoon fresh thyme leaves
1/2 teaspoon ground nutmeg
1 teaspoon salt
1/2 teaspoon black pepper
1/2 cup grated parmesan cheese

If you prefer a lighter sauce, you can substitute the heavy cream with extra whole milk or a splash of vegetable broth. For a dairy alternative, unsweetened cashew milk and plant based butter work well, though the sauce may be slightly thinner. If you do not have fresh thyme, half a teaspoon of dried thyme or rosemary is an excellent substitute, and you can swap the parmesan for a sharp white cheddar if you want a bolder cheese flavor.

Step-by-Step Instructions to Make Scalloped Sweet Potatoes

Step 1: Preparation

Preheat your oven to 375 degrees Fahrenheit and generously grease a 9 by 13 inch baking dish with butter or a light coating of oil. Peel your sweet potatoes and slice them into uniform rounds, about one eighth of an inch thick, using a sharp knife or a mandoline for the best results.

Step 2: Sauté the Aromatics

In a medium saucepan, melt the butter over medium heat. Once the butter is bubbling, add the minced garlic and cook for about one minute until it becomes fragrant, being careful not to let it brown or burn.

Step 3: Create the Roux and Sauce

Whisk the all purpose flour into the melted butter and garlic, cooking for another minute to remove the raw flour taste. Slowly pour in the milk and heavy cream while whisking constantly to ensure no lumps form. Continue to cook and stir until the sauce thickens enough to coat the back of a spoon.

Step 4: Season the Sauce

Remove the saucepan from the heat and stir in the salt, black pepper, nutmeg, and fresh thyme. Add half of the parmesan cheese into the sauce and stir until it has melted completely into the mixture.

Step 5: Layer the Potatoes

Arrange the sweet potato slices in the prepared baking dish, either by layering them flat or overlapping them slightly in rows for a beautiful presentation. Pour the creamy sauce evenly over the top of the potatoes, using a spatula to ensure the sauce gets between the layers.

Step 6: Bake the Dish

Cover the baking dish tightly with aluminum foil and bake for 40 minutes. This traps the steam and ensures the potatoes become perfectly tender. After 40 minutes, remove the foil, sprinkle the remaining parmesan cheese over the top, and bake for an additional 20 minutes until the top is golden brown and the sauce is bubbly.

Tips for Success

To ensure your Scalloped Sweet Potatoes come out perfectly every time, try to slice the potatoes as evenly as possible so they cook at the same rate. If you notice the cheese is browning too quickly during the final stage of baking, you can loosely tent the foil back over the dish. Letting the dish rest for 10 minutes after it comes out of the oven is also crucial, as this allows the sauce to set and makes it much easier to serve clean portions.

Variations of Scalloped Sweet Potatoes

For a bit of texture, you can add a layer of crispy turkey bacon bits between the potato slices or sprinkle them on top during the last few minutes of baking. If you enjoy a bit of crunch, a topping of toasted pecans or breadcrumbs mixed with butter adds a delightful contrast to the creamy interior. You can also infuse the cream with a bit of orange zest for a citrusy note that complements Christmas flavors beautifully.

Serving Suggestions: What to Pair with Scalloped Sweet Potatoes

This dish is a star player next to a classic Christmas roast turkey or a herb crusted roast beef. For a balanced holiday plate, serve it alongside roasted green beans with almonds or a crisp apple and walnut salad. The creamy richness of the potatoes also pairs wonderfully with tangy cranberry sauce or a savory mushroom gravy.

Storage & Reheating Instructions

Leftovers can be stored in an airtight container in the refrigerator for up to four days. To reheat, place individual portions in the microwave for a minute or two, or put the entire dish back in the oven at 350 degrees Fahrenheit, covered with foil, until heated through. If the sauce seems a bit thick after refrigeration, a tiny splash of milk before reheating can help restore its creamy consistency.

Memories Made Around the Table

I remember the first time I made this for our family Christmas, and the way the golden crust shimmered under the dining room lights. My grandmother, who usually preferred traditional mashed potatoes, asked for a second helping and then immediately asked for the recipe. Now, every time I peel a sweet potato, I am reminded of those cozy evenings filled with laughter and the warmth of a full house.

FAQs

Can I make this dish ahead of time?

Yes, you can assemble the dish and pour the sauce over the potatoes up to 24 hours in advance. Keep it covered in the refrigerator and simply add about 10 minutes to the covered baking time since the dish will be cold when it enters the oven.

Do I need to peel the sweet potatoes?

While peeling provides a more refined and uniform texture for a Christmas dinner, you can leave the skins on if you prefer a more rustic look. Just be sure to scrub the potatoes thoroughly before slicing.

What is the best way to slice the potatoes evenly?

A mandoline slicer is the most efficient tool for achieving perfectly even slices, which ensures even cooking. If you are using a knife, take your time and aim for slices that are roughly the thickness of a coin.

Can I use yams instead of sweet potatoes?

In most grocery stores, what are labeled as yams are actually orange fleshed sweet potatoes, which are perfect for this recipe. True yams are starchier and less sweet, so it is best to stick with the vibrant orange sweet potatoes for that classic holiday flavor.

How do I prevent the sauce from curdling?

To prevent curdling, ensure you add the milk and cream slowly while whisking and do not let the sauce come to a rolling boil once the dairy is added. Keeping the heat at a medium or medium low setting helps maintain a smooth emulsion.

Final Thoughts

Scalloped Sweet Potatoes are more than just a side dish, they are a comforting embrace on a cold Christmas day. With their golden edges and velvety sauce, they bring a touch of elegance to your holiday table without requiring hours of complicated prep work. I hope this recipe becomes a cherished part of your festive celebrations just as it has in mine.

Scalloped Sweet Potatoes

Print Recipe

Total Time: 1 hour 20 minutes

Ingredients

3 lbs sweet potatoes, peeled and sliced into 1/8 inch rounds
4 tablespoons butter
3 cloves garlic, minced
1/4 cup all purpose flour
1 1/2 cups whole milk
1 cup heavy cream
1 teaspoon fresh thyme leaves
1/2 teaspoon ground nutmeg
1 teaspoon salt
1/2 teaspoon black pepper
1/2 cup grated parmesan cheese

Instructions

Preheat your oven to 375 degrees Fahrenheit and generously grease a 9 by 13 inch baking dish with butter or a light coating of oil. Peel your sweet potatoes and slice them into uniform rounds, about one eighth of an inch thick, using a sharp knife or a mandoline for the best results.
In a medium saucepan, melt the butter over medium heat. Once the butter is bubbling, add the minced garlic and cook for about one minute until it becomes fragrant, being careful not to let it brown or burn.
Whisk the all purpose flour into the melted butter and garlic, cooking for another minute to remove the raw flour taste. Slowly pour in the milk and heavy cream while whisking constantly to ensure no lumps form. Continue to cook and stir until the sauce thickens enough to coat the back of a spoon.
Remove the saucepan from the heat and stir in the salt, black pepper, nutmeg, and fresh thyme. Add half of the parmesan cheese into the sauce and stir until it has melted completely into the mixture.
Arrange the sweet potato slices in the prepared baking dish, either by layering them flat or overlapping them slightly in rows for a beautiful presentation. Pour the creamy sauce evenly over the top of the potatoes, using a spatula to ensure the sauce gets between the layers.
Cover the baking dish tightly with aluminum foil and bake for 40 minutes. This traps the steam and ensures the potatoes become perfectly tender. After 40 minutes, remove the foil, sprinkle the remaining parmesan cheese over the top, and bake for an additional 20 minutes until the top is golden brown and the sauce is bubbly.

Cook Time: 80 minutes
Diet: Vegetarian