These healthy scalloped sweet potatoes are creamy, cheesy, and made without heavy cream at just 170 calories per serving. A lighter garlic Gruyère sauce bakes into every layer until bubbly and golden. It's the healthier holiday side dish I make every single year.
A Quick Look At The Recipe
- ✅ Recipe Name: Healthy Scalloped Sweet Potatoes (No Heavy Cream!)
- 🕒 Ready In: 55 minutes
- 👪 Serves: 10 - 12
- 🍽 Calories: ~170 per serving
- 🥣 Main Ingredients: Sweet potatoes, Gruyère, milk, garlic, shallots, butter, arrowroot (or cornstarch), thyme, salt, pepper
- 📖 Dietary Info: Gluten-free, no heavy cream, vegetarian, lightened-up
- ⭐ Why You'll Love It: All the creamy, cheesy richness of classic scalloped potatoes - at less than half the calories of traditional recipes.
SUMMARIZE & SAVE THIS CONTENT ON
I love potatoes in pretty much any form - my Crispiest Oven Roasted Potatoes and Air Fryer Sweet Potato Cubes are on regular rotation in my kitchen. But when I want something layered, cheesy, and a little more elegant, this scalloped sweet potato recipe is it. It's naturally gluten-free and vegetarian, and it comes together in one baking dish in under an hour.
I tested this recipe with different cheeses, milk types, and thickeners before landing on Gruyère with milk and arrowroot - it was the only combination that tasted rich and creamy without the heavy cream. I've made it every Thanksgiving and Christmas since, and it's the side dish people ask about before the turkey.
Pair it with my Creamy Mashed Cauliflower Recipe, Balsamic Maple Brussels Sprouts, or check out my full Healthy Thanksgiving Recipes for more holiday sides.
Jump to:
- A Quick Look At The Recipe
- Why This Healthier Version Actually Tastes Indulgent
- Ingredients You'll Need
- Easy Substitutions I've Actually Tested
- How to Make Creamy Scalloped Sweet Potatoes (Step-by-Step)
- Video Tutorial (Step-by-Step)
- What to Do When Things Go Wrong
- Expert Tips
- What to Serve with Scalloped Sweet Potatoes
- What's the Difference Between Scalloped Sweet Potatoes and Sweet Potato Casserole?
- Frequently Asked Questions
- How to Store and Reheat Scalloped Sweet Potatoes
- More Lightened-Up Side Dish Recipes You'll Love
- 📖 Recipe
- 💬 Comments
Why This Healthier Version Actually Tastes Indulgent
- Creamy without heavy cream: Milk + arrowroot gives you a velvety sauce that coats every layer - no cream needed.
- Gruyère makes the difference: It melts more smoothly and is nuttier than cheddar. I've tested both.
- Naturally gluten-free: Arrowroot replaces the usual flour roux.
- 170 calories per serving: Half the calories of traditional scalloped potatoes.
- Make-ahead friendly: Assemble up to 24 hours ahead, bake when ready.
Ingredients You'll Need
- Sweet Potatoes: Choose medium, firm sweet potatoes with deep orange flesh. I peel mine, but you can leave the skin on if you scrub them well.
- Gruyère Cheese: My favorite for this recipe - it melts smoother and nuttier than cheddar or Parmesan. Sharp white cheddar works if that's what you have, but Gruyère is worth grabbing.
- Butter: Just 1.5 tablespoons for the whole dish. That's about a quarter of what most scalloped potato recipes use, and the sauce still comes out silky.
- Shallots: I've tested this with onions, and shallots win every time. Milder, sweeter, and they melt right into the sauce.
- Garlic: Fresh garlic only - it gives the sauce its savory backbone.
- Milk: No heavy cream needed. Skim keeps it extra light, whole milk makes it richer. All work.
- Broth: A splash adds depth and keeps the sauce lighter. I use chicken bone broth, but vegetable broth works for a vegetarian version.
- Arrowroot Starch (or Cornstarch): This replaces the flour roux in traditional recipes while keeping them gluten-free. Same thickener I use in my Healthy Alfredo Pasta Sauce.
- Fresh Thyme, Salt & Pepper: Thyme balances the potatoes' natural sweetness. Don't skip it.
Scroll to recipe card for quantities!
Easy Substitutions I've Actually Tested
- Cheese: Sharp white cheddar works for a bolder flavor. A mozzarella-Parmesan mix melts well, too - but Gruyère gives the best result.
- Make it Dairy-Free: Unsweetened almond or cashew milk in place of regular milk, plus dairy-free shredded cheese or nutritional yeast. Sauce still comes out creamy.
- Thyme: 1 teaspoon dried thyme if you don't have fresh. Rosemary also works well with sweet potatoes.
- Arrowroot: Cornstarch is a 1:1 swap - just whisk it into cold liquid before adding to the warm sauce. Flour works, but the sauce won't be as glossy.
- Shallots: ¼ cup finely diced yellow onion in a pinch. Stronger flavor, but it works.
How to Make Creamy Scalloped Sweet Potatoes (Step-by-Step)
- Step 1: Sauté the aromatics. Melt the butter in a saucepan, then sauté the shallots and garlic until soft and fragrant.
- Step 2: Make the sauce. Whisk in the milk, thyme, bay leaf, salt, and pepper. Simmer, then slowly stir in the arrowroot-broth slurry until it thickens.
- Step 3: Slice the sweet potatoes. Meanwhile, slice your sweet potatoes about ⅛ inch thick. A mandoline makes this fast, but a sharp knife works.
- Step 4: Start layering. Pour a small amount of sauce into the bottom of your greased 9-inch round baking dish.
- Step 5: Add the potatoes. Layer the sweet potato slices in the dish, overlapping slightly.
- Step 6: Pour the sauce. Pour the remaining creamy garlic sauce evenly over the top.
- Step 7: Bake covered. Cover with foil and bake at 400°F for 30-35 minutes, or until the potatoes are tender when pierced with a fork.
- Step 8: Add the cheese. Remove foil and top with shredded Gruyère.
- Step 9: Bake uncovered. Return to the oven for 10-15 minutes until golden, bubbly, and cheesy.
Video Tutorial (Step-by-Step)
What to Do When Things Go Wrong
- Sauce too thin: Whisk 1 teaspoon of arrowroot into a few tablespoons of cold broth, stir it into the sauce, and simmer until thickened.
- Sauce too thick: Stir in a splash of milk or broth until it pours easily.
- Potatoes turned out dry: You uncovered them too early. Bake covered first - that steam is what cooks the potatoes through.
- Sauce broke or curdled: The heat was too high. Keep it at a gentle simmer and don't boil once the milk is in.
Expert Tips
- Slice evenly. Aim for about ⅛ inch thick. A mandoline makes this fast, but a sharp knife works. Uneven slices = some mushy, some undercooked. I learned that the hard way.
- Bake covered first. This is the single most important step. Covering traps steam and softens the potatoes; uncovering at the end gets you that golden, bubbly Gruyère top.
- Whisk starch into cold liquid. Always dissolve arrowroot or cornstarch in cold milk or broth before adding it to the warm sauce. I once added it straight to hot liquid - instant clumps, had to start over.
- Shred your own cheese. Pre-shredded Gruyère has anti-caking agents that make the sauce grainy. I always grate it fresh - the difference in how it melts is night and day.
What to Serve with Scalloped Sweet Potatoes
- Roasted or grilled chicken - like my Air Fryer Boneless Chicken Thighs or Balsamic Feta Stuffed Chicken.
- Beef or steak - a rich main balances the lighter sauce nicely.
- Turkey or ham - this was built for Thanksgiving and Christmas.
- Green sides - try Air Fryer Broccolini or a crisp Kale Pomegranate Salad to add freshness.
- Full holiday spread- pair with my Healthy Cranberry Orange Sauce, crispy Maple Roasted Brussels Sprouts, and Healthy Almond Flour Cornbread for a cozy fall meal.
What's the Difference Between Scalloped Sweet Potatoes and Sweet Potato Casserole?
Completely different dishes. Scalloped sweet potatoes are thinly sliced and layered with a savory cream sauce and cheese - think au gratin. Sweet potato casserole is mashed sweet potatoes, usually sweetened and topped with marshmallows or a brown sugar pecan crumble. This recipe is the savory, cheesy, layered version.
Frequently Asked Questions
Yes - that's exactly what this recipe is. Sweet potatoes work beautifully in a scalloped dish. Slice them thin (⅛ inch), layer with sauce, and bake. The natural sweetness pairs well with savory garlic and Gruyère.
Healthier than traditional, yes. This version uses milk instead of heavy cream, 1.5 tablespoons of butter (vs. the usual 4+), and arrowroot instead of flour. It comes in at 170 calories per serving - about half of most scalloped potato recipes.
Yes. The sauce uses milk and arrowroot starch, which thickens into a velvety texture without cream. I've made this with skim, 2%, and whole milk - all work.
Yes. Assemble up to 24 hours ahead, cover, refrigerate, and bake as directed. This is how I prep mine for every holiday.
Usually, the dish wasn't covered long enough, or the starch wasn't fully activated. Always bake covered first, and always whisk arrowroot into cold liquid before adding to the sauce.
Gruyère. It melts more smoothly and is nuttier than cheddar. Sharp white cheddar or a mozzarella-Parmesan blend also works, but Gruyère is worth it.
How to Store and Reheat Scalloped Sweet Potatoes
- Store: In an airtight container in the fridge for up to 4 days.
- Reheat: Cover with foil and warm at 350°F for 15-20 minutes. Uncover the last 5 minutes to re-crisp the cheese.
- Freeze: I don't recommend it. The sauce and cheese separate once thawed.
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
Healthy 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.
Tati Chermayeff says
So glad you loved it, Christine! Sweet potatoes add such a great creamy texture — I'm with you, I almost always reach for them over regular potatoes. Thanks for the rating!