Scalloped Potato Gratin

Scalloped Potato Gratin
Ryan Liebe for The New York Times. Food Stylist: Simon Andrews.
Total Time
1½ hours
Rating
4(2,205)
Notes
Read community notes

Is there anything better than a molten, golden-topped potato gratin? I don’t think so, either. This one stays fairly classic — scented with sage, garlic and nutmeg, then showered with lots of nutty Gruyère. My tweak is in form rather than flavor. Instead of piling the potatoes an inch or two deep in a gratin dish, I shingle the slices in a shallow sheet pan. It gives the whole thing a more elegant look, and you get maximum browning and crunch on top. There’s less of the gooey center, but what it loses in ooze it makes up for in increased surface area for the crisp-edged baked cheese.

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Ingredients

Yield:8 to 10 servings
  • ¼cup unsalted butter (½ stick), plus more for greasing the aluminum foil, at room temperature
  • 3cups heavy cream
  • ¼cup chopped fresh sage leaves
  • 4fat garlic cloves, finely grated or minced
  • ¼teaspoon freshly grated nutmeg
  • teaspoons fine sea salt, plus more as needed
  • 5large eggs
  • 4pounds russet potatoes (about 6 large or 8 medium)
  • Freshly ground black pepper
  • cups grated Gruyère (8½ ounces)
Ingredient Substitution Guide
Nutritional analysis per serving (10 servings)

576 calories; 41 grams fat; 25 grams saturated fat; 1 gram trans fat; 11 grams monounsaturated fat; 2 grams polyunsaturated fat; 38 grams carbohydrates; 4 grams dietary fiber; 3 grams sugars; 17 grams protein; 586 milligrams sodium

Note: The information shown is Edamam’s estimate based on available ingredients and preparation. It should not be considered a substitute for a professional nutritionist’s advice.

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Preparation

  1. Step 1

    Heat oven to 350 degrees, and brush ¼ cup butter on a rimmed 17-by-13-inch baking sheet. Brush one or two pieces of foil (enough to cover the top of the pan) with more butter. Set the foil aside.

  2. Step 2

    In a medium pot, bring the cream, sage, garlic, nutmeg, and a pinch of salt to a simmer. Simmer until reduced by a quarter, about 15 minutes.

  3. Step 3

    In a large heatproof bowl, lightly beat the eggs. Beating constantly, gradually add a little of the hot cream to the eggs, then slowly pour in the rest of the hot cream, whisking to prevent the eggs from curdling. Set aside.

  4. Step 4

    Using a mandoline or a sharp knife, slice the potatoes into ⅛-inch-thick rounds.

  5. Step 5

    Arrange one layer of potatoes on the buttered baking sheet, slightly overlapping the slices. Sprinkle with ¾ teaspoon of the salt, add pepper to taste, then pour half the egg mixture over the potatoes. Top with ½ cup cheese. Repeat the layers of potato, seasoning and egg mixture. Top with the remaining 1¾ cups cheese. Cover the baking sheet with the foil (buttered-side down) and bake for 20 minutes. Remove the foil and bake until the potatoes and cheese are browned and bubbling, 25 to 30 minutes. Let cool slightly, then serve.

Tip
  • You can assemble the gratin up to 4 hours before baking. Store it, loosely covered, in the fridge. The gratin can also be baked 4 hours ahead, kept uncovered at room temperature, and then reheated in a 450-degree oven until the top is shiny. It’s not quite as gooey as when freshly baked, but it’s still quite good.

Ratings

4 out of 5
2,205 user ratings
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Cooking Notes

For 4 servings, this recipe works just fine if you cut the quantities in half and use a quarter sheet pan.

Substituting 2 cans of evaporated milk for the heavy cream works out well.

I love your idea for the vegetable combination! I think the issue is with the yukon golds and other vegetables, which are not starchy. Russets produce lots of starch which help thicken up the whole thing, whereas Yukon golds don't (which makes for better mashed potatoes and potato salads). I figured this out the hard way when I used them for a gratin Dauphinois that, despite a very long time in the oven, absorbed almost none of the milk - a problem I've never had using russets.

I've had a hankering for scalloped potatoes and have been reading recipes. All of them call for Gruyere cheese. But at $20/lb, or more, I think I'll stick with mac and cheese. Would cheddar work in a recipe like this?

I made this yesterday, and it was very good. Maximizing crispy surface area is a win. A few things based on others questions and comments-- >Yes, you can cut the number of eggs. >No, you do not need 1/4 cup of butter to grease the sheet pan. I love butter, but you could cut in half. >Heavy cream is delightful, but you could probably sub half-n-half to cut fat. >My potatoes had v thin skins, so peeling not needed. >More sage, nutmeg, salt, pepper, and I added some horseradish for a kick.

Making this in a sheet pan pretty much guarantees that the potatoes will come out done in the allotted time. Skip the eggs, they do nothing for this recipe. I prefer to use creme fraiche instead of heavy cream.

This was delicious and worth a bit of fuss. I used 1 tbls of ground sage + a pinch of ground nutmeg because I didn’t have fresh - plus my family is not crazy about nutmeg. I sautéed garlic (added 1 clove) and shallots in a bit of butter before adding the cream based on a comment here. We added some additional cheese to the top - what we had on hand - shaved Parmesan and shredded Mex blend (don’t judge - Covid). I don’t like baking on aluminum foil - parchment paper worked well. Family loved it!

NYT Notes: Substituting 2 cans of evaporated milk for the heavy cream works out well.

If you are calorie obsessed, try, if you can, to burn some, then you can enjoy the consumption of same. Life is a negotiated affair. Muy delicioso!

Loved the baked cheesiness and the perfectly cut portions however this lacked some flavor. Would add more garlic and maybe some sauteed onions or shallots to the mix next time. I will make this again with some adds.

Fabulous. Takes at least an hour longer to prepare than indicated. Loved the consistency. I did not alter the recipe, but I always wonder why others do? I am not a chef but love to act like one.

Thanks Melissa, for this crowd-pleaser. It certainly pleased the crowd of 1 (my wife) in my house. I made it as a mixed gratin, with yukon golds, yellow beets, celery root and onion, plus a little preserved lemon in the custard. Of course I have a nit to pick with you. Using an eggy custard instead of the usual milk/cream/butter gratin medium seems to hope for a bread pudding effect. Instead, there are curds of egg throughout, which makes for an odd texture: no creaminess. What am I missing?

I will never make au gratin another way again. Lots of crispy topping, cut into beautiful squares. I froze a few leftover squares and they were amazing reheated. Served with eggs, chicken, chops, anything. Absolutely recommend this recipe! I did use light cream. Yummy!

Hi Sam, Love your recipes and now - with a national lockdown of ALL UK citizens on the horizon, was the time to cheer ourselves up with a really generous and sybaritic dish. And this gratin totally did cheer us up. So thanks!

Hi. I love your modifications with the beets and celery root. If you had curds when it was done I wonder if that would be from adding the hot cream to the eggs too quickly - and/or not stirring lightly/consistently enough while adding - so the cream/eggs were overly hot to begin with? That is the fussiest part of the recipe IMO. I didn’t have curds. My consistency was not like bread pudding. I found that it kept the potatoes from being runny. It felt creamy without being wet if that makes sense.

So it’s 2 layers of potatoes, right?

Not worth the effort...too fussy for an just ok dish. Back to Joy's scalloped potatoes.

This is the best of many recipes I have made previously. I made only half the recipe, but sliced the potatoes on a mandoline 3/16-in thick (¼-in is too thin). My slices fit perfectly, making two layers on a 9-by-13 in. sheet pan. The egg mixture created a perfect binding.

Added a few items I had on hand. Didn't have fresh sage, so I used powdered sage with the addition of fresh thyme and bay leaves. Using a mandoline, I sliced the potatoes so they were almost transparent and did 3 layers. I also greased the pan with duck fat and topped the dish with some additional raclette. Turned out very tasty and wonderfully nuanced.

I made this for Easter today and it was delicious. I followed some of the other recommendations by reducing the eggs to 2, used half & half instead of heavy cream, added a lightly sautéed onion to the cream mix. Leeks would also be good. I was generous with the herbs, salt and pepper; used 1 T of dried sage and a generous pinch of dried nutmeg.

It makes far more than a baking sheet allows. It is delicious, and the fresh sage and nutmeg add just the right touch to your palette. Next time, I'll use a lasagna pan. Love the gruyere!

I did the two cans of evaporated milk with lots of garlic - came out well but not crispy on top so a few minutes on broil got it there. Will make again for a crowd too much for just two of us. Reheated leftovers in oven to keep it crispy.

Seems like 350 it's not hot enough. Cooked the full 20 minutes, then 30 and they didn't brown and seem not quite cooked. Why reheat at 450 and cook at 350? I did cook 2 sheet pans so maybe that made for extra time. I upped the temp to 400 for another 5 and turned on convection. Next time I will use convection the whole time the foil is off.

I found that the eggs made the dish too custardy. The cook time was longer in my convection oven, which could have been because I had to use Gold potatoes instead of russets, which were out of stock. It also filled up a sheet pan, and I had some mess with drips in my oven. I wouldn’t make this again.

I added crumbled bacon slices to the heavy cream mixture but otherwise made as the recipe instructs. The eggs set during the cookinh process and this became a strange omelette situation. It does taste wonderful... so maybe less eggs next time?

2 eggs recommended, count out potatoes per layer as it’s only 2 layers

My other half was skeptical about using such a thin broad pan for this recipe as he’s more used to the thick and gooey version. After dinner he said these some of the best potatoes he’d ever eaten. I ended up using a few more potatoes (and a bit more salt) than called for due to going a little overboard with the overlapping slices, but otherwise followed the recipe exactly. Delicious!

Alas, I am a Melissa Clark fan, but this one was a huge disappointment to all of us. I followed the recipe exactly and will never make it again, even with mods. Too much work, too expensive. My mom's old fashioned scalloped potatoes (with no cheese) on a budget is back at the top of my list.

Prepared recipe incorporating helpful suggestions. I then used the bottom of my broiler pan instead of the sheet pan. Large enough area and the sides are a bit higher to alleviate spillage. Oh yes, had fresh chives, so snipped with kitchen shears for an added garnish. It was delicious leftover also.

Made for Friendsgiving. Needed to bake a lot longer and needed more salt. Otherwise really good

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Credits

Adapted from “Dinner in French: My Recipes by Way of France” (Clarkson Potter, 2020)

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