Gruyère & Leek Scalloped Potatoes
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These Gruyère & Leek Scalloped Potatoes are creamy, cheesy, layered potato perfection with just the right hint of garlic and nutmeg. Comforting, rich, and destined to disappear faster than anything else on the table.
The Magic Is In The Leeks (And The Cheese)
I have made a lot of scalloped potatoes in my time and let me tell you, most of them lean one of two ways. Too dry or way too soupy. This version hits the sweet spot. Tender Yukon Golds, a silky cream sauce cooked with sautéed leeks, and enough Gruyère to make every bite worth it. The leeks give you a mild onion flavor without overpowering anything, which means the cheese still gets to shine.
And yes, I know this is technically a side dish. But if you find yourself hovering over the pan with a spoon before dinner even hits the table, I completely understand.
Why You’ll Love These Scalloped Potatoes
- Real cream sauce, not from a can
- Leeks make it cozy without sharp onion bite
- Gruyère melts like a dream
- Completely make ahead friendly
- Perfect with turkey, roast beef, ham or honestly just a fork
Ingredients and Tips
- Yukon Gold potatoes hold their shape and do not go mushy. Russets work, but they are softer and more starchy.
- Slice potatoes evenly, about ⅛ inch. A mandoline helps, but a sharp knife does the job too.
- Leeks love to trap dirt. Slice first, then rinse well in a bowl of water.
- Heavy cream gives you the best results. Half and half works, but it will be thinner.
- Gruyère melts beautifully and adds nutty richness. Swiss is the closest sub.
- Nutmeg is subtle but important. It’s what makes the cream sauce taste layered and not flat.
- Don’t skip the flour. It helps the sauce cling to the potatoes instead of pooling at the bottom.
- Shred your own cheese. Pre-shredded has anti-caking agents that prevent smooth melting.
- Let it rest after baking. The sauce thickens, the layers settle, and slicing becomes effortless.
Here’s how this comes together. It’s a simple process, but it helps to build it in the right order so the sauce thickens, the potatoes cook evenly, and the cheese melts into a golden, bubbling top.
Start by melting the butter in a large skillet over medium heat. Add the sliced leeks and cook them gently for 5 to 6 minutes until they soften. This step builds the flavor base and takes away any raw onion bite. Stir in the garlic and let it cook for 30 seconds.
Now sprinkle the flour over the leeks and whisk for about a minute. This cooks off the raw flour taste and will help thicken the cream later. Slowly pour in the heavy cream, whisking as you go so you get a smooth, velvety sauce. Season with salt, pepper, and nutmeg, then simmer for 2 to 3 minutes until slightly thickened. It should coat the back of a spoon.
Butter your baking dish, then spread half the sliced potatoes in an even layer. They don’t need to be perfect, just try to keep them fairly flat so they cook evenly. Pour half the leek cream mixture over the potatoes, then sprinkle half the Gruyère.
Repeat with the remaining potatoes, sauce, and Gruyère. Finish with the Parmesan. This gives you a gorgeous browned top.
Cover the dish with foil and bake at 375 °F (190 °C) for 40 minutes so the potatoes steam and soften. Then uncover and bake for another 20 minutes. This is when the cheese browns and the sauce thickens into that rich, creamy texture we want.
Once it comes out of the oven, let it sit for 10 minutes. This final rest helps the layers settle and makes slicing much cleaner. Yes, it’s worth it.
Then serve. The top is golden, the potatoes are tender, and the center is creamy with just a hint of nutmeg. Perfection.
How To Serve It
A rich, creamy potato side like this calls for something main-worthy beside it, and honestly it holds its own with just about anything on a holiday table. Here are some of my favorites to pair it with:
Brined Roast Turkey Breast
Prime Rib Roast
Crockpot Brown Sugar Cola Glazed Ham
Honey Garlic Pork Loin
Frequently Asked Questions
Can I make this ahead?
Yes. Assemble the whole dish, cover it tightly, and refrigerate up to 24 hours. Add 10 to 15 extra minutes of bake time if it’s going into the oven cold.
Can I freeze scalloped potatoes?
I don’t recommend freezing this one. Cream sauces tend to split once thawed, and the texture won’t be the same.
What if I don’t have Gruyère?
Use Swiss, Fontina, or even a good sharp white cheddar. Just pick something that melts well.
Do I have to peel the potatoes?
I always do for a cream-based bake like this. But if you like the texture of the skins, you can leave them on. Just scrub well.
Can I use milk instead of cream?
You’ll end up with a thinner sauce that doesn’t cling as well. Heavy cream is best, half and half is the closest substitute.
How do I store leftovers?
Refrigerate up to 4 days. Reheat covered at 350 °F (177 °C), or microwave in smaller portions. If it thickens too much, add a splash of cream to loosen.
Try These Recipes Next
- Funeral Potatoes
- Loaded Scalloped Potatoes
- Potatoes Romanoff
- Potatoes Au Gratin
- One Pot Meatballs and Potatoes
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Gruyère & Leek Scalloped Potatoes
Ingredients
- 2 tablespoons butter
- 2 large leeks (white and light green parts only, thinly sliced)
- 2 cloves garlic (minced)
- 2 tablespoons all-purpose flour
- 2 cups heavy cream
- ½ teaspoon salt
- ¼ teaspoon freshly ground black pepper
- ¼ teaspoon nutmeg
- 3 pounds Yukon Gold potatoes (peeled and thinly sliced (about ⅛ inch thick))
- 1½ cups Gruyère cheese (shredded )
- ½ cup Parmesan cheese (grated )
Before You Begin! If you make this, please leave a review and rating letting us know how you liked this recipe! This helps our business thrive & continue providing free recipes.
Instructions
- Preheat oven to 375 °F (190 °C). Butter a 9×13-inch baking dish.
- In a large skillet, melt 2 tablespoons butter over medium heat. Add 2 sliced leeks and cook 5 to 6 minutes until soft. Add 2 minced garlic cloves and cook another 30 seconds.
- Sprinkle in 2 tablespoons flour and whisk for 1 minute. Slowly pour in 2 cups heavy cream, whisking until smooth. Add ½ teaspoon salt, ¼ teaspoon pepper, and ¼ teaspoon nutmeg. Simmer 2 to 3 minutes until thickened.
- Layer half the 3 pounds sliced potatoes in the prepared dish. Pour over half the leek cream mixture and sprinkle with half the 1½ cups Gruyère. Repeat with remaining potatoes, sauce, and cheese. Finish with ½ cup Parmesan on top.
- Cover with foil and bake 40 minutes. Uncover and bake another 20 minutes until golden and bubbly.
- Let sit 10 minutes before serving so the layers set nicely.
Notes
- Slice potatoes evenly so they cook at the same rate. A mandoline makes it easy, but a sharp knife works too.
- Leeks can be sandy. Slice first, then swish them in a bowl of water to remove grit.
- Shred your own cheese for the best melt. Pre-shredded has anti-caking agents that prevent smooth melting.
- Heavy cream gives the sauce a silky finish. Half and half works if needed, but skip regular milk.
- Let it rest before serving. The layers set and you get cleaner slices.
- Leftovers reheat beautifully. Add a splash of cream if it looks too thick.
Nutrition Information
Notice: Nutrition is auto-calculated for your convenience. Where relevant, we recommend using your own nutrition calculations.
