Creamy Scalloped Potatoes – Make-Ahead Thanksgiving Side Dish
Creamy Scalloped Potatoes are thinly sliced potatoes baked in a garlic, thyme and Gruyère-cheddar cream sauce until golden. A make-ahead Thanksgiving side dish that frees up oven time on the big day.
Creamy Scalloped Potatoes are the ultimate Thanksgiving side dish: tender layers of potato baked in a garlic, thyme and Gruyère-cheddar cream sauce until the top is golden and bubbling. They taste completely indulgent, but the recipe is surprisingly straightforward. Even better, you can assemble it a day ahead and bake it when the turkey comes out of the oven, which is exactly why this casserole earns a permanent spot on many holiday tables.
Why You'll Love This Creamy Scalloped Potatoes
This is not just another potato dish. It is the side that makes everyone ask for the recipe. Here is what I love about it:
- Make-ahead friendly: You can put the whole casserole together 24 hours in advance, so on Thanksgiving Day all you have to do is preheat the oven and bake.
- Rich and creamy: The combination of heavy cream, whole milk, Gruyère, and sharp cheddar creates a velvety sauce that soaks into every slice of potato.
- Simple to scale: The recipe fits a 9x13 dish and can be doubled for a large crowd or halved for a small family dinner.
- Always a hit: It is one of the most requested side dishes at holiday gatherings, and it goes with just about everything.
Ingredient Notes
Yukon Gold potatoes are my top pick for Creamy Scalloped Potatoes. Their naturally buttery flavor and medium-starch texture mean they stay slice-shaped and tender instead of turning mushy. If you only have russets, they work too, but they tend to soak up more sauce and break down a little more easily.
The sauce is made with heavy cream and whole milk for richness without being overwhelmingly heavy. A little whole milk keeps the sauce from becoming too thick while it bakes. If you need a lighter version, you can use half-and-half in place of the heavy cream, though the texture will be slightly less luxurious.
Cheese matters here. Gruyère melts beautifully and adds a nutty, slightly sweet flavor that pairs wonderfully with potatoes. Sharp cheddar gives the top a golden color and a familiar taste. You can substitute Gruyère with fontina or Swiss, and the cheddar can be swapped for a good melting cheese like Monterey Jack.
For aromatics, fresh garlic and fresh thyme make a big difference. I use three cloves of garlic and a full teaspoon of thyme leaves; you can add more if you love garlic. A pinch of ground nutmeg is optional, but it adds warmth and depth without making the dish taste spiced.
How to Make Creamy Scalloped Potatoes
Start by preheating the oven to 375°F and buttering a 9x13-inch baking dish. Peel and slice the potatoes into 1/8-inch rounds, using a mandoline for speed and consistency. Meanwhile, heat the cream, milk, garlic, thyme, salt, pepper, and nutmeg in a saucepan just until it starts to simmer. You do not want to boil it, just let the flavors infuse into the liquid.
To assemble, arrange half the potatoes in a slightly overlapping layer, then pour half the cream mixture over the top and sprinkle with half the shredded cheeses. Repeat with the remaining potatoes, cream mixture, and cheese. Cover the dish tightly with foil and bake for 40 minutes. The foil traps steam and helps the potatoes cook through. Remove the foil and continue baking for about 20 minutes, until the top is deeply golden and the potatoes are easily pierced with a knife. Let the casserole rest for 10 minutes before serving so the sauce thickens and the layers hold together.
Tips for the Best Creamy Scalloped Potatoes
- Use a mandoline or a sharp chef's knife to slice the potatoes uniformly. This is the single most important step for even cooking.
- Do not slice the potatoes too thick. A 1/8-inch thickness ensures they become tender in the same amount of time it takes the cheese to brown.
- Season the cream sauce generously. Potatoes need salt, and the sauce should taste slightly well-seasoned before it goes into the dish.
- Cover the dish with foil for the first 40 minutes. If you skip this, the top may brown too quickly and the potatoes could still be raw in the center.
- Rest after baking. Letting the casserole sit for at least 10 minutes helps the sauce absorb into the potatoes and makes serving clean-cut slices much easier.
Make Ahead and Storage
To make Creamy Scalloped Potatoes ahead of time, assemble the casserole in the baking dish, cover it tightly with foil, and refrigerate for up to 24 hours. When you are ready to bake, take the dish out of the fridge and let it sit at room temperature for about 30 minutes to take the chill off. Bake at 375°F for 50 minutes covered, then remove the foil and bake for an additional 20 minutes, or until the potatoes are soft and the top is golden.
Leftovers can be stored in an airtight container in the refrigerator for up to 4 days. To reheat, cover the dish with foil and warm it in a 350°F oven for 15 to 20 minutes, or reheat individual portions in the microwave for 1 to 2 minutes. The sauce may absorb into the potatoes as it sits, so a splash of warm cream or milk before reheating can bring back some creaminess.
What to Serve With Creamy Scalloped Potatoes
This side dish is a natural partner for roast turkey, and that is a classic Thanksgiving pairing for good reason. It also works beautifully with roast chicken, grilled steak, or oven-baked salmon. For a full plate, add a bright, slightly tangy element like cranberry sauce, a simple green salad with lemon vinaigrette, or sautéed green beans with shallots. Warm dinner rolls or crusty bread are ideal for sopping up every bit of the creamy sauce. Since the potatoes are rich, keep the rest of the meal lighter and let this casserole be the star of the sideboard.
Ingredients
- 3 lbs Yukon Gold potatoes, peeled and sliced 1/8-inch thick
- 2 cups heavy cream
- 1 cup whole milk
- 3 cloves garlic, minced
- 1 teaspoon fresh thyme leaves, plus more for garnish
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1/4 teaspoon ground nutmeg
- 1 cup grated Gruyère cheese
- 1 cup grated sharp cheddar cheese
- 2 tablespoons butter, softened
Instructions
Preheat and slice
Preheat the oven to 375°F. Butter a 9x13-inch baking dish. Peel and slice the potatoes into 1/8-inch thick rounds using a mandoline or a very sharp knife.
Simmer the cream sauce
In a medium saucepan, combine the heavy cream, milk, garlic, thyme, salt, pepper, and nutmeg. Warm over medium heat just until steaming and small bubbles appear at the edges. Do not boil. Remove from the heat.
Layer the casserole
Arrange half of the potato slices evenly in the prepared dish. Pour half of the warm cream sauce over the potatoes, then sprinkle with half of the Gruyère and cheddar. Repeat with the remaining potatoes, sauce, and cheese.
Bake covered
Cover the dish tightly with foil and bake for 40 minutes. This steams the potatoes so they cook through evenly.
Brown and finish
Remove the foil and continue baking for 20 minutes, until the top is golden and a knife easily pierces the center. Rest for 10 minutes before serving.
Notes
- Use a mandoline for the most even slices and the best texture.
- If the top starts getting too dark, cover loosely with foil during the uncovered baking time.
- To make ahead, assemble the dish, cover, and refrigerate up to 24 hours. Add about 10-15 minutes to the covered baking time.
- You can replace the Gruyère with fontina or Swiss cheese.
Nutrition Facts
Frequently asked questions
Can I make Creamy Scalloped Potatoes ahead of time?
Yes, assemble the casserole, cover it tightly, and refrigerate for up to 24 hours. When ready to bake, let it sit at room temperature for 30 minutes, then bake covered for 50 minutes and uncovered for 20 minutes at 375°F.
How long do Creamy Scalloped Potatoes take to cook?
In a 375°F oven, they bake for 40 minutes covered and 20 minutes uncovered, for a total of 60 minutes. The potatoes are done when a knife slides through the center easily and the top is golden.
What cheese can I use in Creamy Scalloped Potatoes?
Gruyère and sharp cheddar work best, but you can substitute Gruyère with fontina or Swiss cheese, and the cheddar with Monterey Jack or Colby. Use cheeses that melt well.
Do I need to peel the potatoes for Creamy Scalloped Potatoes?
Peeling gives the smoothest texture, but you can leave the skins on if you prefer a more rustic dish. Just scrub them well and slice thinly.
Can I freeze Creamy Scalloped Potatoes?
Yes, you can freeze the unbaked casserole for up to 2 months. Thaw it overnight in the refrigerator, then bake covered for 50 minutes and uncovered for 20 minutes, adding extra time if needed.
Why are my Creamy Scalloped Potatoes still hard?
If the potatoes are hard, they were likely sliced too thick or the oven temperature was too low. Slice them 1/8-inch thick and make sure the casserole is bubbling before removing the foil.
