These easy scalloped sweet potatoes taste rich and comforting, but they're secretly made without heavy cream. Thin slices of sweet potato soak up a lighter garlic Gruyère sauce that turns bubbly and golden in the oven. It's cozy, elegant, and the kind of holiday side you make once… then every year after.
A Quick Look At The Recipe
- ✅ Recipe Name: Easy Scalloped Sweet Potatoes (No Heavy Cream!)
- 🕒 Ready In: 55 minutes
- 👪 Serves: 10 - 12
- 🍽 Calories: ~170 per serving
- 🥣 Main Ingredients: Sweet potatoes, Gruyère, milk, garlic, onion, olive oil, arrowroot (or cornstarch), thyme, salt, pepper
- 📖 Dietary Info: Gluten-free, no heavy cream, vegetarian, lightened-up
- ⭐ Why You'll Love It: This scalloped sweet potato recipe is creamy, cozy, and secretly healthier; guaranteed to impress at holidays or cozy weeknights.
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When I first started developing a healthier scalloped sweet potato recipe, I didn't want to just "lighten it up" — I wanted it to taste like the ultra-creamy, restaurant-level versions I grew up loving. So I spent weeks testing different combinations of milk, broth, cheeses, and thickeners until I landed on a garlic Gruyère sauce that baked into the sweet potatoes like a dream.
The first time I pulled the winning version from the oven, the top was golden and bubbly, the layers were tender, and the sauce was creamy without a drop of heavy cream. It immediately became my go-to. Over the years, I've made it for Friendsgiving, family holidays, and weeknight dinners, and every time someone asks, "How is this so creamy without cream?"
If you love cozy, healthier sides, pair this with my Maple Roasted Acorn Squash Slices, Balsamic Maple Brussels Sprouts, or Creamy Mashed Cauliflower Recipe for the perfect fall-inspired and holiday-ready spread. If you're planning your menu, check out my Healthy Thanksgiving Recipes for more cozy inspiration.
Jump to:
- A Quick Look At The Recipe
- Why You'll Love This Recipe
- Ingredients You'll Need
- Easy Substitutions & Variations
- How to Make Creamy Scalloped Sweet Potatoes (Step-by-Step)
- 1 Minute Video Tutorial
- Expert Tips
- Troubleshooting Guide
- Serving Suggestions
- Storage & Make Ahead Tips
- Frequently Asked Questions
- More Lightened-Up Side Dish Recipes You'll Love
- 📖 Recipe
- 💬 Comments
Why You'll Love This Recipe
- Creamy without heavy cream: A lighter garlic Gruyère sauce gives you all the richness of classic scalloped potatoes—without feeling heavy or greasy.
- Cozy + comforting: Thin slices of sweet potato bake into tender, melt-in-your-mouth layers that are perfect for holidays or chilly weeknights.
- Naturally gluten-free: Made with arrowroot or cornstarch, so everyone at the table can enjoy it.
- Crowd-pleasing flavor: A touch of garlic, thyme, and Gruyère makes this taste restaurant-level delicious with minimal effort.
- Make-ahead friendly: You can prep it in advance, making holiday cooking much easier.
- Healthier twist: Less butter, no heavy cream, and lighter ingredients—without losing the cozy, cheesy vibes you want. Just like my Healthy Mac and Cheese!
Ingredients You'll Need
- Sweet Potatoes: The star of the dish! Choose medium, firm sweet potatoes with deep orange flesh.
- Gruyère Cheese: My favorite cheese for this recipe because it melts beautifully and adds a rich, nutty flavor. Sharp white cheddar also works great, or you can do a mix of mozzarella and Parmesan if that's what you have on hand.
- Butter: Just a little goes a long way here. I use about one-quarter of the butter most traditional recipes call for, and the sauce still comes out silky and flavorful.
- Shallots: I've tested this recipe with onions, and shallots always win. They're milder and sweeter, so they melt into the sauce and add depth without overpowering the garlic.
- Garlic: Fresh garlic is key — it gives the sauce that savory, cozy flavor that makes every bite irresistible.
- Milk: No heavy cream needed. Skim milk keeps things extra light, while 2% or whole milk gives you a richer, more classic feel. All options work; it just depends on what you're going for.
- Broth: A splash of broth adds depth and keeps the sauce lighter than cream-based versions. I prefer chicken bone broth for the flavor and protein, but vegetable broth works perfectly too.
- Arrowroot Starch (or Cornstarch): This is my secret to a smooth, velvety sauce that never curdles. It's naturally gluten-free and replaces the flour-based roux you'll see in most scalloped potato recipes.
- Fresh Thyme, Salt & Pepper: These brighten the whole dish and balance the sweetness of the potatoes with warm, savory flavor.
Scroll to recipe card for quantities!
Easy Substitutions & Variations
- Cheese Options: Gruyère is my favorite, but you can easily swap it with sharp white cheddar for a bolder flavor. A mix of mozzarella and Parmesan also melts beautifully, adding extra creaminess to the sauce.
- Dairy-Free Version: Use unsweetened almond or cashew milk in place of regular milk, and swap in a dairy-free shredded cheese (or nutritional yeast for a lighter option). The sauce still turns out creamy and delicious. Also, check out my Dairy-Free Tomato Soup!
- Fresh Thyme Substitutes: If you don't have fresh thyme, substitute 1 teaspoon of dried thyme. Rosemary or sage are great seasonal swaps and pair beautifully with sweet potatoes.
- Arrowroot starch substitutes: Cornstarch is a perfect 1:1 swap and is still naturally gluten-free — just whisk it into cold milk or broth before adding it to the warm sauce. You can also use all-purpose or gluten-free flour, though the sauce will be slightly less glossy.
- Shallot Swap: If you're out of shallots, use ¼ cup finely diced yellow onion. It's a little stronger in flavor, but it works perfectly in a pinch.
- Sweeter Twist: Add one tablespoon of maple syrup or a pinch of cinnamon for a sweet-and-savory variation that's perfect for Thanksgiving or holiday dinners.
Need to substitute an ingredient?
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How to Make Creamy Scalloped Sweet Potatoes (Step-by-Step)
- Step 1: Melt the butter in a saucepan, then sauté the shallots and garlic until they are soft and fragrant.
- Step 2: Whisk in the milk, thyme, bay leaf, salt, and pepper. Then, simmer and slowly stir in the arrowroot-broth slurry until it thickens.
- Step 3: Meanwhile, slice your sweet potatoes into thin slices, approximately ⅛ inch thick.
- Step 4: Pour a small amount of the sauce into the bottom of your greased 9-inch round baking dish.
- Step 5: Layer the sweet potatoes (each about ⅛ inch) in the dish.
- Step 6: Pour the remaining creamy garlic sauce evenly over the top.
- Step 7: Cover with foil and bake at 400°F for 30–35 minutes, or until the potatoes are tender when pierced with a fork.
- Step 7: Remove the dish from the oven, uncover it, and top with shredded Gruyère cheese.
- Step 9: Bake again, uncovered, for 10–15 minutes until the top is golden, bubbly, and cheesy.
1 Minute Video Tutorial
Expert Tips
- Slice the potatoes evenly. Aim for slices about ⅛ inch thick. Using a mandoline makes this process super quick, but a sharp knife works just as well. Even slices ensure the potatoes cook evenly and turn tender—not mushy.
- Bake covered first. My #1 tip for perfect scalloped sweet potatoes. Covering the dish traps steam and softens the potatoes; then, uncovering at the end gives you that golden, bubbly cheese top that everyone loves.
- Whisk starch into cold liquid. Always mix arrowroot or cornstarch into cold milk or broth before adding it to the warm sauce. Adding starch directly to hot liquid causes clumping and can ruin the texture.
- Shred your own cheese. Freshly grated cheese melts smoother and creamier. Pre-shredded cheese contains anti-caking agents that prevent it from melting evenly, which can make the sauce grainy.
- Make it ahead. Assemble the dish up to 24 hours in advance, cover, and refrigerate. Bake as directed when you're ready to serve. It's the easiest way to take stress out of holiday cooking.
- Make-ahead tip. Assemble this dish up to a day in advance, cover, and refrigerate. When ready to serve, bake as directed for a quick and easy side dish.
Troubleshooting Guide
I've tested this scalloped sweet potato recipe many times — here are the most common issues and exactly how to fix them:
Sauce too thin:
Whisk one teaspoon of arrowroot (or cornstarch) with a few tablespoons of cold milk or broth to make a slurry, then stir it into the warm sauce. Simmer gently until it thickens and coats the back of a spoon.
Sauce too thick:
Stir in a splash of milk or broth until the sauce loosens and pours easily over the potatoes.
Potatoes turned out dry:
This usually means the dish didn't steam long enough. Make sure to bake covered first, then uncover to brown at the end.
Sauce broke or curdled:
The heat was too high. Keep the sauce at a gentle simmer and whisk continuously. Avoid boiling once the dairy is added.
Serving Suggestions
These creamy garlic scalloped sweet potatoes are the ultimate side dish for holiday dinners, family gatherings, or cozy weeknights. They pair well with just about everything, but here are a few of my favorites:
- Roasted or grilled chicken — like my Air Fryer Boneless Chicken Thighs or Balsamic Feta Stuffed Chicken.
- Beef or steak — A rich, hearty main balances the velvety layers of sweet potatoes beautifully—great for Sunday dinners or special occasions.
- Turkey or ham — These are made for Thanksgiving and Christmas spreads. The savory garlic sauce complements classic holiday proteins so well.
- Green sides — try Air Fryer Broccolini or a crisp Kale Pomegranate Salad to add freshness.
- As a Thanksgiving Side — serve these potatoes with my Healthy Cranberry Orange Sauce, crispy Maple Roasted Brussels Sprouts, and Healthy Almond Flour Cornbread for a cozy fall meal.
Storage & Make Ahead Tips
- Make ahead: Assemble the entire dish up to 24 hours in advance, cover tightly, and refrigerate. When you're ready to serve, bake as directed. This is the easiest way to take stress out of holiday cooking.
- Store: Let leftovers cool completely, then transfer to an airtight container. They'll keep well in the fridge for up to 4 days.
- Reheat: Cover loosely with foil and warm at 350°F for 15–25 minutes, or until heated through. If you want to re-crisp the cheesy top, uncover for the last 5 minutes.
- Freezing: I don't recommend freezing scalloped sweet potatoes. The creamy sauce and cheese can separate once thawed, which affects the texture.
Frequently Asked Questions
Yes. This recipe uses skim milk instead of heavy cream, less butter, and a gluten-free thickener. You still get a rich, cheesy, cozy result—just without the heaviness.
Yes! Assemble the dish up to 24 hours in advance, cover tightly, and refrigerate. Bake as directed when you're ready to serve. The potatoes hold up beautifully, and the sauce stays creamy — it's one of the best make-ahead holiday sides.
Absolutely. This recipe is designed to be cream-free but still incredibly silky. The garlic sauce is made with milk, broth, and arrowroot starch, which thickens into a velvety, rich texture without the heaviness of cream. Skim, 2%, or whole milk all work.
Gruyère is my top choice because it melts smoothly and adds a nutty, elevated flavor. Sharp white cheddar, fontina, or a blend of mozzarella and Parmesan also work well — choose what fits your flavor preference.
Yes. Yukon golds or russets both work great if you want a more traditional scalloped potato flavor. Slice them to the same thickness (about ⅛ inch) and bake as directed — no timing changes needed.
This happens when potatoes are not baked long enough, are not covered, or when the starch is not fully activated. Bake covered first, and ensure your arrowroot/cornstarch slurry is mixed into cold liquid before heating.
More Lightened-Up Side Dish Recipes You'll Love
If you loved these scalloped sweet potatoes, here are a few more recipes to try next:
Did you make this recipe?
If you make this recipe, be sure to comment and rate it down below. Also, don't forget to tag me @healthfulblondie on Instagram and use the hashtag #healthfulblondie so I can see your delicious creation and share it with my followers!
📖 Recipe
Easy Scalloped Sweet Potatoes
Ingredients
- 3 lbs sweet potato, ~4 larger sweet potatoes
- 1.5 tablespoon unsalted butter, + more to grease the dish, or you can use spray
- 4 small shallots, sliced thin
- 3 - 4 large garlic cloves, minced
- 1 ½ cups skim milk, 2% or whole milk works too
- ¼ cup low-sodium chicken or vegetable broth
- 1 teaspoon salt
- ½ teaspoon black pepper
- 1 teaspoon fresh thyme leaves
- 1 Bay leaf
- 1 tablespoon arrowroot starch*
- 4 - 6 oz shredded gruyère
Instructions
- Prep: Preheat the oven to 400°F. Grease a 9-inch round baking dish with butter or olive oil spray.
- Prepare the Sweet Potatoes: Trim the ends off the sweet potatoes and slice them very thinly (about ⅛ inch thick). A mandoline makes this fast and ensures even cooking. Set aside.
- Make the Starch Slurry: In a small bowl, whisk the arrowroot starch into a few tablespoons of cold milk or broth to make a slurry.
- Sauté the Shallots: Melt 1 tablespoon butter in a medium saucepan over medium heat. Add the sliced shallots and minced garlic. Cook for 3–5 minutes, until fragrant and softened.
- Make Sauce: Stir in the milk, broth, thyme, bay leaf, salt, and pepper, and let it gently simmer for 5 minutes. Pour the slurry into the saucepan and simmer for another 3–5 minutes, or until the sauce thickens slightly and smells aromatic.
- Assemble: Pour about ½ cup of the sauce into the bottom of the greased baking dish. Arrange the sliced sweet potatoes on top in a neat, overlapping pattern. Pour the remaining sauce evenly over the potatoes, making sure all slices are coated.
- Bake (Covered): Cover the dish tightly with foil and bake for 30–35 minutes, or until the potatoes are beginning to soften.
- Add Cheese & Finish Baking: Remove the foil, sprinkle the shredded Gruyère evenly over the top, and return the dish to the oven. Bake uncovered for 10 minutes, or until the cheese is melted, bubbly, and golden.
- Enjoy!
Christine says
Super cheesy and delicious! I love sweet potatoes more than regular potatoes so this was a huge hit.