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Easy Scalloped Sweet Potatoes

These easy scalloped sweet potatoes are a quick and easy side dish made with tender sweet potatoes, a creamy garlic-herb sauce, and parmesan cheese! Unlike traditional sweet potato casserole, this version is rich and savory, not sweet. A perfect side recipe for thanksgiving day, Christmas dinner, or an addition to weeknight family dinner!

Close-up of golden baked sweet potato gratin with layers of thinly sliced sweet potatoes and melted parmesan in a cast iron dish.

A Quick Look At The Recipe

Recipe: Scalloped Sweet Potatoes

Ready In: 1 hour + 10 minutes (mostly baking time!)

Serves: 8 servings

Staple Ingredients: sweet potatoes, cream, parmesan, butter, garlic, shallot.

What Makes It Special: these sweet potatoes will provide a unique side dish at any table or gathering! They are different then traditional au gratin or scalloped potatoes and a more savory option to tradition sweet potato casserole. These have been a hit for years, I think it’s due to the creamy garlic parmesan sauce, yum!

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5 Star Recipe Reviews

  • I made this as a side for Christmas dinner at my sister’s and LOVED it! I’m not a huge Parmesan fan so instead I used a delicious 7 year old white cheddar – YUM – highly recommend! Thanks for the recipe, we will be making again. – Michelle
  • It was delicious! Everyone enjoyed it. – Emily
  • I tried this recipe and added jalapeños to it. Absolutely delicious! I also substituted shallots for green onion. Very hearty and delicious! – Shay
  • This recipe was super tasty and I would def make it again. Loved it! – Laura
  • This was the first time I’ve had sweet potatoes done savoury, and wow, what a great recipe, with perfect seasoning. I’ve made this several times and will continue. thank you! – Anonymous
Overhead view of baked sweet potato gratin topped with shaved parmesan in a black cast iron skillet on a rustic brown surface.

I make these for Thanksgiving dinner every year and several times throughout the year! I am a big sweet potato fan, but these are just something special, and with hundreds of ratings and reviews others seem to agree. If you like this sweet potato dish, you’ll love these Fluffy Baked Potatoes, Potatoes Au Gratin, or twice baked sweet potatoes! Check out all of my Side Dish Recipes for more recipe inspiration!

Perfect Pairing: Everyday Blend

This recipe pairs perfectly with my Everyday Blend. It’s balanced with garlic, onion, and warm herbs that bring out the best in simple ingredients. Use it on chicken, veggies, or even eggs to take your everyday cooking up a notch.

Key Ingredients

sheet pan with ingredients listed out and labeled.
  • Sweet potatoes: try to find uniform sweet potatoes so they bake up evenly and are easier to slice! Long and thin potatoes work best.
  • Butter: salted or unsalted butter will work, if using salted butter you may not need to add as much kosher salt to season. I don’t recommend using margarine as it can be to watery.
  • Garlic: fresh garlic works best in this recipe, or use jarred minced garlic. Add as much garlic as you’d like!
  • Shallot: I like a shallot for a more mild taste but any kind of onion will work, use yellow onion, red onion, or white onion.
  • Heavy cream: I like the richness of the heavy whipping cream. Or use half and half, whole milk, or 2%milk.
  • Herbs: I like a mix of fresh thyme and oregano, any fresh herbs will work! Dried herbs can be used if needed.
  • Cheese: I highly recommend a fresh grated parmesan cheese, it’s not overly heavy but adds a nice flavor. Gruyere cheese, Colby jack, Monterey jack, or cheddar cheese could be a substitute, you could also substitute a vegan cheese.

How to Make The Sweet Potatoes

Let’s talk a little about how to make the recipe (The printable instructions are in the recipe card below.)

Quick Overview:

  • Prep garlic, shallot, herbs, and sweet potato.
  • Sauté garlic and shallots in butter with herbs and seasoning. Mix in heavy cream and cheese.
  • Toss sliced potatoes with the cream mixture.
  • Arrange in a baking dish.
  • Broil and enjoy!

1: Preheat oven to 400 degrees F, lightly grease a baking dish and set aside. Add sliced sweet potatoes to a large mixing bowl.

2. In a small saucepan heat the butter over medium-high heat. Once warm add in the garlic and shallot, sauté for 2-3 minutes until fragrant. Add in the fresh thyme, salt, and pepper. Remove from heat and stir in the heavy cream and parmesan cheese, stir until parmesan is melted.

3. Pour the cream mixture over the sweet potatoes, toss well to combine. Arrange potato slices upright in the prepared baking dish, top with any remaining cream sauce.

4. Bake for 50-60 minutes or until the sweet potatoes are fork tender. Serve immediately garnished with extra fresh thyme.

Video How-To

Rachel’s Chef Tips

  • Peel your potatoes for an smooth and creamy consistency, skin can be left on if desired.
  • Use a mandolin for evenly sliced potatoes that bake at the same time. Slicing sweet potatoes by hand makes it hard to get the same thickness.
  • Use fresh grated parmesan for best results, store-bought cheese includes an anti-caking ingredients which may change the texture of the sauce.
  • Bake until fork tender for best results, check doneness of potatoes with a fork before serving.
  • Assemble early: if you want to assemble these ahead of time, do so and cover until ready to serve then bake and serve warm. They can be arranged 1-2 days in advance to lighten your holiday load!

Easy Scalloped Sweet Potatoes

Written By: Rachel Walker
Thinly sliced sweet potatoes tossed in a cheesy, garlic cream sauce and baked until tender. Similar to classic au gratin potatoes, a great side dish for family dinner or a holiday meal!
4.47 from 113 votes
Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Course Side Dish
Cuisine American
Servings 8 servings
Calories 275 kcal

Equipment

Ingredients
 
 

  • 2-3 medium Sweet potatoes, peeled and thinly sliced
  • 4 tbsp Unsalted butter
  • 2-3 Cloves of garlic, minced
  • 1 medium Shallot , finely diced
  • 1 tsp Kosher salt
  • Fresh cracked black pepper
  • 2-3 sprigs Fresh thyme
  • 1 1/2 cups Heavy cream
  • 1 cup Shredded parmesan cheese

Instructions
 

  • Preheat oven to 400 degrees F, lightly grease a baking dish and set aside. Add sliced sweet potatoes to a large mixing bowl.
    2-3 medium Sweet potatoes
  • In a small saucepan heat the butter over medium-high heat. Once warm add in the garlic and shallot, sauté for 2-3 minutes until fragrant. Add in the fresh thyme, salt, and pepper. Remove from heat and stir in the heavy cream and parmesan cheese, stir until parmesan is melted.
    4 tbsp Unsalted butter, 2-3 Cloves of garlic, 1 medium Shallot , 1 tsp Kosher salt, Fresh cracked black pepper, 2-3 sprigs Fresh thyme, 1 1/2 cups Heavy cream , 1 cup Shredded parmesan cheese
  • Pour the cream mixture over the sweet potatoes, toss well to combine. Arrange potato slices upright in the prepared baking dish, top with any remaining cream sauce.
  • Bake for 50-60 minutes or until the sweet potatoes are fork tender. Serve immediately garnished with extra fresh thyme.

Notes

*Peel your potatoes for an extra smooth and creamy consistency, skin can be left on if desired.
*Use a mandolin for evenly sliced sweet potatoes that bake at the same time. Slicing sweet potatoes by hand makes it hard to get the same thickness and can create slices that are thicker than preferred.
*Bake until fork tender for best results, check doneness of potatoes before serving.
*Make-Ahead, assemble the gratin up to 1-2 days in advance, cover, and refrigerate. Bake just before serving for the freshest texture.

Nutrition

Serving: 1servingCalories: 275kcalCarbohydrates: 24gProtein: 7gFat: 15gSaturated Fat: 9gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gTrans Fat: 1gCholesterol: 44mgSodium: 300mgPotassium: 419mgFiber: 4gSugar: 5gVitamin A: 16531IUVitamin C: 3mgCalcium: 197mgIron: 1mg
Keywords: Au gratin, casserole, Easter, Holiday Sides, Scalloped Potatoes, Sweet Potatoes, Thanksgiving, Vegetable Side
Did you make this recipe?Let me know how it was! Leave a comment below and tag @theheartylife on Instagram and hashtag it #theheartylife.

If you enjoyed this recipe, I would appreciate if you left a star rating on the recipe card above or a comment below sharing your experience! I value your feedback, it would also mean a lot if you could share this recipe or my website with friends or loved ones. Cheers!

More Holiday-Worthy Side Dishes

These side dishes are effortless and definitely deserve a place on your holiday table! They can be plated or served directly out of the casserole dish.

Warm-toned overhead shot of sweet potato gratin in a black oval Staub dish, topped with melted parmesan and served with white wine.

Recipe FAQs

Can I freeze my scalloped sweet potatoes?

I do not recommend freezing the scalloped potatoes either uncooked or cooked. These are best enjoyed fresh, freezing will change the texture of the potatoes and could cause the sauce to break.

How long do I bake scalloped potatoes?

If sliced thinly and evenly, these will cook from in 50-60 minutes. Adjust timing as needed until desired consistency is reached. The thickness of the potatoes will impact baking time.

Do you soak sweet potatoes in water before cooking?

No, you do not need to soak these potatoes before baking. When making fries it can be helpful to soak the potatoes prior to baking or frying to pull out some of the starch. But that is not needed when baking these potatoes.

Do I need to peel my potatoes for scalloped potatoes?

It is recommended to peel the sweet potatoes for these scalloped potatoes so you get a smooth, creamy texture. But you can leave unpeeled if desired.

Can I add toppings to my sweet potato dish?

Yes, you can sprinkle on crumbled bacon, a little brown sugar, maple syrup, or a drizzle of hot honey.

Tools I Recommend

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  • Handheld Mandolin – perfect for getting even slices, this mandolin has a rubber handle for good grip and a safety guard. Plus it takes up very little space and you can change the thickness as desired. I highly recommend a mandolin for even sliced potatoes.
  • Stainless Steel Sauce Pan – the perfect size pan for warming up the cream mixture! I love my stainless steels pans these have lasted for years.
  • Baking Dishthe perfect size dish for these scalloped sweet potatoes! I have a couple casserole dishes on hand in different sizes and shapes for a fun table spread. You never know when you will need more than one pan!

Did you try this recipe?

Let me know what you thought by leaving a comment below and sharing your final dish on InstagramFacebook, & Pinterest!

Cheers!
-Rachel

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16 Comments

  1. made this for Christmas dinner and it was such a hit my husband has sent it to everyone and talks about it all the time. I’m making it again tonight!

  2. I tried this recipe and added jalapeños to it. Absolutely delicious! I also substituted shallots for green onion. Very hearty and delicious!

  3. I’m just putting in oven…..do you cover with tinfoil? Sauce tastes delicious but I couldn’t get potato sto stand up.

  4. 5 stars
    This was the first time I’ve had sweet potatoes done savoury, and wow, what a great recipe, with perfect seasoning. I’ve made this several times and will continue. thank you!

  5. Question – it says you can make ahead of time by a day or two. Does that mean combining the potatoes and sauce and keeping in fridge? Will the texture get weird that way? Thinking ahead for Thanksgiving.

    1. Hi Nicole, yes – you can either assemble a day ahead of time, wrap tightly (plastic and foil), and store in the fridge until ready to bake. Or assemble and bake according to the recipe, let cool, cover tightly and reheat when ready to serve. Happy holidays!

    1. Hi Carrie, I haven’t tried this in the crockpot, but I bet it would work! Layer the sweet potatoes in the base and pour over the cream mixture but don’t stir. I’d probably do low so the bottom and sides didn’t burn. Enjoy!

4.47 from 113 votes (112 ratings without comment)

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