Scalloped Yukon Gold and Sweet Potato Gratin

Scalloped Yukon Gold and Sweet Potato Gratin is the kind of dish that feels special without being intimidating. It brings together the buttery richness of Yukon Gold potatoes with the natural sweetness of orange flesh, all held together by a creamy, garlicky bath. Think of it as the perfect side that can stand up to a roast chicken, a holiday ham, or even a crisp autumn salad. This recipe is approachable, forgiving, and incredibly cozy, making it easy to cook for weeknights or to present when you want to impress without stress.

Why You’ll Love This Scalloped Yukon Gold and Sweet Potato Gratin

There are a few reasons this dish tends to win hearts around the table. First, the texture is standout: the Yukon Golds stay creamy on the inside while the top develops a delicate, slightly crisp crust from the cheese and butter. Second, the sweetness of the sweet potatoes is balanced by the savory notes of garlic, cheese, and fresh thyme, so every bite feels rich but not cloying. Third, the recipe is friendly for a variety of occasions. It can be prepped ahead and baked just before serving, or assembled and refrigerated to bake off later. Finally, the color story is beautiful: pale orange layers peek through the pale corners of the potatoes, creating a visually inviting dish that looks as good as it tastes.

Ingredients for Scalloped Yukon Gold and Sweet Potato Gratin

• 2 medium Yukon Gold potatoes, peeled and sliced thin — provide creamy richness and a gentle, buttery flavor. Their color tones keep the dish lively without overpowering the plate.
• 2 medium sweet potatoes, peeled and sliced thin — add warmth and a natural sweetness that complements the savory notes.
• 2 cups heavy cream or half and half — this is the silky backbone of the sauce. If you want a lighter version, use half heavy cream and half milk, or a non dairy alternative with a splash of oil and a little cornstarch slurry.
• 1 clove garlic, minced — infuses the sauce with a gentle garlic aroma without overpowering the potatoes.
• 1 cup grated cheese (Parmesan or Gruyere) — provides a sharp, savory depth and helps form that golden crust on top.
• 1/2 cup grated sharp cheddar — adds a touch of tang and creaminess, enriching the surface melt.
• 2 tablespoons unsalted butter, melted — for flavor and to help the top brown nicely.
• 1/4 teaspoon ground nutmeg — a subtle warm note that pairs beautifully with potatoes and cream.
• Salt and freshly ground black pepper — to season the layers throughout.
• 1 tablespoon fresh thyme leaves or 1/2 teaspoon dried thyme — a bright herb that lifts the richness with a herbal lift.

Step-by-Step Guide to Making Scalloped Yukon Gold and Sweet Potato Gratin

1. Preheat the oven to 375F and lightly grease a shallow baking dish with a bit of butter to prevent sticking and help the top brown.
2. In a small bowl, whisk together the minced garlic, cream, nutmeg, and a pinch of salt and pepper. This is your creamy infusion that brightens the dish without making it feel heavy.
3. Arrange the sliced potatoes in the dish. You can alternate potato types or create a random layered pattern, just make sure you keep the slices evenly thin for uniform cooking.
4. Pour the cream mixture over the layered potatoes, then drizzle the melted butter across the surface. Sprinkle half of the grated Parmesan or Gruyere and the cheddar evenly on top.
5. Sprinkle half of the thyme over the top. Cover the pan with foil and bake for about 30 minutes to let the flavors mingle and the starches soften.
6. Remove the foil, press the potatoes down slightly to submerge them in the liquid, and sprinkle the remaining cheese on top. Bake uncovered for another 20 to 25 minutes, or until the potatoes are tender and the top is golden and bubbly.
7. Let the gratin rest for 10 minutes before slicing. This helps the sauce thicken a bit and makes serving neater.

Timing & Preparation Details

• Active prep time: about 15 minutes
• Active cooking time: 50 minutes total (30 minutes covered, 20 minutes uncovered)
• Rest time: about 10 minutes after baking
• Make-ahead note: You can assemble up to 24 hours in advance and refrigerate. Bring to room temperature for 15 to 20 minutes before baking and add a few extra minutes to the bake time if starting cold.

Nutritional Snapshot

Per serving estimates are approximate and will vary with ingredients and precise portions. This dish is rich and satisfying, with a comforting balance of fat from cream and cheese, and starch from potatoes.

• Calories: 420
• Protein: 9 g
• Carbohydrates: 39 g
• Fiber: 4 g
• Fat: 26 g
• Saturated fat: 16 g
• Sodium: 320 mg
• Cholesterol: 105 mg

Frequently Asked Questions

Can I use a different cheese or omit it altogether?

Yes. You can swap for a different melting cheese like fontina or mozzarella. If you prefer a lighter version, reduce the cheese by a couple of tablespoons and use a smaller amount of cream. The dish will be a touch less rich, but still delicious.

What if I want to add aromatics or herbs?

Feel free to add a pinch of dried thyme, rosemary, or a bay leaf to the cream while it warms for a more fragrant, savory profile. Remove the bay leaf before layering and baking.

Is this recipe freezer friendly?

Yes. Assemble the dish, cover tightly, and freeze before baking. You may need to add extra bake time when cooking from frozen. Thaw overnight in the fridge before baking to help it cook evenly.

Scalloped Yukon Gold and Sweet Potato Gratin

A comforting, creamy bake that layers thinly sliced Yukon Gold potatoes with sweet potato for a velvety, subtly sweet dish. Rich cream, garlic, and a hint of nutmeg come together to create a budget-friendly, make-ahead side that shines alongside roasted meat or a colorful salad.

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Prep Time 15 minutes mins

Cook Time 20 minutes mins

Servings 4

Calories 420 kcal

Ingredients

  

• 2 medium Yukon Gold potatoes, peeled and sliced thin
• 2 medium sweet potatoes, peeled and sliced thin
• 2 cups heavy cream or half and half
• 1 clove garlic, minced
• 1 cup grated cheese such as Parmesan or Gruyere
• 1/2 cup grated sharp cheddar
• 2 tablespoons unsalted butter, melted
• 1/4 teaspoon ground nutmeg
• to taste salt and freshly ground black pepper
• 1 tablespoon fresh thyme leaves or 1/2 teaspoon dried thyme

Instructions

 

• Preheat the oven to 375F. Lightly grease a shallow baking dish with a dab of butter to prevent sticking and help the top brown nicely.
• Stir together the minced garlic, cream, nutmeg, and a pinch of salt and pepper in a small bowl. This will be the creamy bath that elevates every slice.
• Layer the sliced Yukon Gold and sweet potatoes in the prepared dish. You can alternate the colors or create a circular pattern to look pretty. A gentle, even spread helps ensure uniform cooking.
• Pour the cream mixture over the layered potatoes, then drizzle the melted butter across the top. Sprinkle half of the grated Parmesan or Gruyere and the cheddar evenly over the surface.
• Scatter half the thyme over the top. Cover tightly with foil and bake for about 30 minutes.
• Remove the foil, press the potatoes down gently to submerge them into the cream, and sprinkle the remaining cheese on top. Bake uncovered for another 20 to 25 minutes, or until the potatoes are tender when pierced with a fork and the top is golden and bubbling.
• Let the gratin rest for 10 minutes before serving. This helps the sauce thicken slightly and makes slicing easier.