Cheesy Scalloped Sweet Potato Casserole Recipe

These Cheesy Scalloped Sweet Potatoes are made with tender sweet potato slices, heavy cream, fresh herbs, and melty gruyere cheese. This easy casserole goes perfectly with both comfort food and holiday feasts!

For another tasty sweet potato side dish, try my grilled sweet potato salad! Or, try these easy cheesy scalloped potatoes with regular potatoes.

Why This Recipe Works

This side dish is sort of a mix between sweet potato gratin and scalloped potatoes – you’ll love it!

• Rich, cozy flavors. The sweetness from the potatoes combined with the fresh lemony herbs and buttery gruyere cheese is mouth-wateringly good! Everybody will want seconds.
• Perfect for any occasion. These sweet potatoes are awesome at a holiday meal, but they’ll also work with your favorite steak dinner, or you could make them just because as a comfort food dish.
• Versatile. I chose to add fresh tarragon and thyme to these potatoes so they would pair nicely with the citrus herb mixture I slather on my turkey during the holidays. However, you can customize your scalloped sweet potatoes with black pepper, parsley, or even cayenne pepper if you want to turn up the heat.
• Little effort required. This scalloped sweet potatoes recipe requires just 10 minutes of chopping and whisking, and then all you have to do is pop the potatoes into the oven and wait for them to be done.

What Are Scalloped Potatoes?

Scalloped potatoes are a casserole dish made with thinly-sliced potatoes, a rich cream sauce, and a selection of fresh herbs. As noted above, this sweet potato version sort of combines scalloped potatoes with potatoes au gratin, because it includes layers of gruyere cheese. Technically, you could omit the cheese if you want to make a traditional scalloped potatoes recipe, but I highly recommend leaving it in – you don’t want to miss out on the extra flavor and texture it adds!

Recipe Ingredients

Here’s what you’ll need to round up to make this dish happen. If you’re looking for exact amounts, check out the recipe card at the bottom of the post.

• Sweet potatoes – I find that 1/3” slices are perfect for this recipe. You don’t want the potatoes to be too thick so that they’ll cook all the way through in the oven, but you don’t want them to be too thin either.
• Butter – You can use salted or unsalted butter, whichever you prefer. If you use salted, you may want to omit the additional sea salt.
• Shallot – If you would rather use an onion, that will work too.
• Garlic – Make sure to use freshly minced garlic cloves rather than garlic powder.
• Heavy cream and milk – I find that using a mix of heavy cream and 2% milk gives your potatoes a decadently thick and creamy texture, without making every bite too rich/overpowering.
• Seasoning – Add in a mix of diced fresh thyme, diced fresh tarragon, and sea salt.
• Cheese – I like to stick to shredded gruyere cheese, but you could throw in some parmesan too if you wish.

How to Make Scalloped Sweet Potatoes

This scalloped sweet potatoes recipe is made in just a few simple steps. For the full set of directions, scroll down to the recipe card below.

• Prepare the potatoes. Preheat the oven to 400F and grease a baking dish. Then, use a mandoline to cut the sweet potatoes and add half of the slices to the dish.
• Make the cream and milk mixture. Next, heat a small sauce pan over medium high heat, add butter, and saute the shallots and garlic. After that, stir in the remaining ingredients, bring everything to a boil, and remove the pan from the heat.
• Finish layering the casserole. Pour half of the milk mixture over the sweet potatoes and add half of the gruyere cheese. Then, layer the remaining sweet potatoes on top, followed by the remaining milk and cheese.
• Bake the casserole. Cover the casserole with tin foil and bake for 30 minutes. Then, remove the tin foil and bake for an additional 25-30 minutes, or until the sweet potatoes are tender.

Can I Make This Ahead?

Yes! I highly recommend baking this recipe ahead of time, especially if you’re making it during the holidays and want to free up some oven space for day-of preparations. Simply prepare and bake the casserole, store it for up to 2-3 days in the fridge as directed in the “how to store” section below, and reheat it in the oven until warmed through when you’re ready to enjoy it.

Tips & Variations

• Test for doneness. Make sure the potatoes are tender in the centers (as well as on the edges) before you pull the baking dish out of the oven. Depending on how thick you slice the potatoes, they may need a little more time in the oven!
• Make sure to slice the potatoes to an even thickness. Using a mandoline is the best way to ensure a uniform thickness, but a sharp knife will work as well. You want the potato slices to be as uniform as possible so that everything cooks evenly.
• Broil after baking. If you want an especially golden-brown, crispy cheese topping, feel free to broil your scalloped sweet potatoes for a minute or two after baking.
• Swap in another kind of cheese. I love gruyere in this recipe, but mozzarella and parmesan, for example, are great too! You could also mix some of the above together, if you like.
• Add bacon. Some bacon bits on top of these cheesy potatoes would taste fantastic!

Serving Suggestions

• Turkey: If you’re making these potatoes for Thanksgiving, try pairing them with this easy, no-fuss whole turkey recipe or this garlic herb oven roasted turkey breast.
• Chicken: I highly recommend trying this perfect roasted chicken!
• Steak: Serve these potatoes with something like this grilled ribeye steak too – it’s hard to beat the classic steak and potatoes combo!

How to Store & Reheat Leftovers

I don’t recommend freezing this scalloped sweet potatoes recipe because it’s not possible to preserve the creamy texture. You can, however, store it in the fridge for a few days if need be:

• To store. You can keep scalloped sweet potatoes in an airtight container in the fridge for 3-4 days.
• To reheat. If you don’t really mind a slight change in texture, simply use the microwave. Or, preheat the oven to about 350F, and bake the casserole until it is warmed through.

More Potato Recipes

If you enjoyed these cheesy scalloped sweet potatoes, be sure to give these other easy potato side dishes a look, too!

• Garlic Ranch Potatoes
• The Best Air Fryer Roasted Potatoes
• Garlic Herb Hasselback Potatoes
• Sweet Potato Casserole With Pecan Streusel
• Instant Pot Sweet Potatoes

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