Potatoes au Gratin (Dauphinoise): Golden, Creamy, and Worth Waiting For
Updated: 18 hours ago
Few dishes demonstrate the magic of simple cooking quite like Potatoes Dauphinoise. Thinly sliced potatoes, cream, garlic, a little butter, and a generous amount of patience. Nothing particularly extravagant. Yet somewhere between the oven and the dinner table, those humble ingredients become something rather magnificent.
The potatoes soften, their natural starch thickens the cream, and the surface develops a beautifully golden crust. And then comes the difficult part. Waiting long enough for the dish to settle before helping yourself.
This potatoes au gratin recipe is my golden, cheesy version, and you'll find a classic Dauphinoise version right alongside it, so you can make whichever your table is crying out for.
TIME About 2 hours | SERVES 6 to 8 | LEVEL Easy |
BEFORE YOU START Even ⅛-inch slices are the key to this gratin, and the knife skills lesson in my Kitchen School will help you get them. It takes about five minutes to read. |
Why You'll Love It
NO ROUX NEEDED Potato starch and a little cornstarch thicken the sauce | A CRUST WORTH FIGHTING FOR Three cheeses bake into a golden, bubbling top |
MAKE-AHEAD FRIENDLY It holds beautifully and reheats well | THE PERFECT PARTNER For roast beef, lamb, ham or any holiday table |
Tested in my kitchen · As seen on TODAY and The Tonight Show · Parade magazine's chef for 10 years · About Chef Jon → |
Potatoes au Gratin
Serves 6 to 8 | Prep: 25 minutes | Bake: 75 to 90 minutes | Rest: 10 to 15 minutes
Ingredients
1¼ cups shredded sharp cheddar cheese
1¼ cups shredded Monterey Jack cheese
½ cup grated Gruyère cheese
2 teaspoons cornstarch
3 pounds russet potatoes, peeled and sliced ⅛ inch thick (don’t rinse)
1½ teaspoons salt, divided
½ teaspoon freshly ground black pepper, divided
¾ cup heavy cream
½ cup low-sodium chicken broth
Instructions
STEP 1 OF 4
Prepare the Cheese Blend
Preheat the oven to 350°F (175°C). In a large bowl, combine the cheddar, Monterey Jack and Gruyère. Toss with the cornstarch to coat evenly; this keeps the sauce smooth as it bakes.
You'll know it's right when every shred of cheese is lightly dusted and none of it is clumped together. |
STEP 2 OF 4
Assemble the Gratin
Shingle half the potatoes in a 9x13-inch baking dish. Season with ¾ teaspoon salt and ¼ teaspoon pepper, then sprinkle with 1 cup of the cheese blend.
Layer the remaining potatoes on top and season with the remaining ¾ teaspoon salt and ¼ teaspoon pepper.
Chef Jon's tip: don't rinse the potatoes after slicing. Their natural starch is what binds the layers and thickens the sauce. |
STEP 3 OF 4
Pour, Top, and Bake
Whisk together the cream and chicken broth and pour evenly over the potatoes. Top with the remaining cheese.
Bake for 75 to 90 minutes, until bubbling and deeply golden and a fork glides through the potatoes with ease.
You'll know it's right when the top is bubbling and deeply golden and a fork slides through every layer with no resistance. |
If something's off: if the cheese is browning before the potatoes are tender, tent the dish loosely with foil for the rest of the bake. |
STEP 4 OF 4
Rest, Then Serve
Let the gratin rest for 10 to 15 minutes so the sauce can settle and thicken, then serve.
You'll know it's right when the sauce has thickened enough that a spoonful holds its layers instead of running across the plate. |
Classic Dauphinoise Version
Skip the cheddar and Monterey Jack, rub the dish with a cut garlic clove, and warm the cream with garlic and a sprig of thyme before pouring it over. A little Gruyère on top is optional. Everything else stays the same.
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Tips for Success
Use Russets or Yukon Golds
Their starch helps thicken the sauce, creating that silky texture without a roux.
Slice Consistently
⅛ inch is the sweet spot. A mandoline gives even slices and even cooking. Always use the guard.
Don’t Rinse the Potatoes
You want that natural starch to help bind the layers together.
Add Cornstarch to the Cheese
Tossing shredded cheese with cornstarch keeps the sauce smooth and prevents clumping.
Watch the Top
If the cheese is browning before the potatoes are tender, tent the dish loosely with foil for the rest of the bake.
Let It Rest
A 10 to 15 minute rest lets everything settle and thickens the sauce for easier serving.
Key Ingredients
Russet Potatoes: Their natural starch, left on by not rinsing, binds the layers and thickens the cream into a silky sauce without any roux.
Heavy Cream: The fat protects the sauce through the long bake so it stays luscious and never curdles the way milk can.
Low-Sodium Chicken Broth: A splash cut into the cream keeps the gratin rich but not too heavy, and adds a quiet savoury depth.
Sharp Cheddar Cheese: Brings a tangy, punchy flavour and helps build that golden, bubbling crust everyone fights over.
Monterey Jack Cheese: A lovely melter that keeps the cheese layers creamy and smooth between the slices.
Gruyère Cheese: Adds a nutty, slightly sweet note and a nod to the classic French gratins.
Cornstarch: Tossed with the cheese, it stops clumping and keeps the sauce smooth and velvety as it bakes.
Freshly Ground Black Pepper: Seasoning each layer with salt and pepper means every forkful is properly flavoured, not just the top.
Dauphinoise Dreams: A Culinary Awakening
The culinary classroom smelled of ambition and butter. Knives clattered, gas burners hissed, and the steel benches were always just cold enough to keep you alert. I remember the day I met Gratin Dauphinois, though I couldn’t pronounce it. I called it Dolph Lundgren potatoes after a late-night Rocky marathon. The name stuck. My instructor was less amused.
We sliced russets on a French mandoline, clearly designed by someone with a grudge against fingers. Each swipe sent pale potato slivers fluttering into the bowl like confetti. Then came the cream, steeped with garlic and thyme, filling the kitchen with a scent so divine it made even burnt toast smell poetic.
We layered the potatoes like blankets, scattered Gruyère between each, and poured over the hot cream. It slid into every crevice like warm silk. I got scolded for opening the oven too often. “It’s not the Royal Baby,” my chef barked.
When it finally emerged, golden, bubbling, the top kissed with crisped cheese, I knew I was ruined. The first bite was decadent. Tender potatoes bathed in garlicky velvet, crisp edges giving way to rich, buttery softness. It fogged my glasses and silenced the room.
To this day, Potatoes au Gratin is my favorite dish. Not just for the taste, but for that first bite, in a too-bright kitchen, with burnt toast and big dreams in the air. One dish. One bite. A lifetime of chasing that feeling.
The Secret to Silky Layers (Not a Curdled Catastrophe)
Many a promising gratin has been ruined by curdled sauce. The usual culprit? Milk. Well-intentioned (and certainly cheaper), milk has too little fat to protect its proteins through a long, hot bake, so they tighten and separate. The result? Something that tastes like regret.
The fix is simple and utterly luxurious: heavy cream, cut with a little chicken broth so it never feels too heavy. The fat keeps everything luscious and cohesive. No flan-like wobble. No watery nonsense.
Toss your cheeses (yes, plural) with a bit of cornstarch. It keeps the cheese from clumping and helps the sauce stay smooth, velvety enough to make even Casanova blush.
The Secret to Potatoes Dauphinoise: When Potatoes, Cream, and Patience Become Something Extraordinary
I've always thought the French deserve a certain amount of admiration for what they've managed to accomplish with a potato.
Give an Englishman a potato, and there's a reasonable chance he'll boil it, mash it, or throw it into a roasting tin with enough fat to concern his cardiologist. Give a French cook the same potato, a little cream, some garlic, and a baking dish, and they'll produce something that could quite comfortably appear on the menu of a very expensive restaurant.
Potatoes Dauphinoise. A dish of extraordinary simplicity. And, when made properly, extraordinary pleasure.
At first glance, there's very little to it. Thinly sliced potatoes are arranged in a baking dish, covered with seasoned cream, and baked until tender. But what happens inside that dish is rather more interesting.
The potatoes slowly soften. Their natural starch thickens the cream. The garlic perfumes the sauce. And the surface develops a beautiful golden crust while the layers underneath become soft, rich, and wonderfully delicate.
It's one of those dishes where understanding a few small details makes all the difference. And the first of those details begins with choosing the right potato.
The First Stage: Choosing a Potato That Knows What It's Doing
Not all potatoes behave the same way when introduced to cream and a hot oven. Some are wonderfully floury. Others are waxy and determined to hold their shape. And then there are those that sit somewhere in the middle, which is where I think some of the most useful potatoes live.
For Potatoes Dauphinoise, we want a potato that will become tender while releasing enough starch to help thicken the cream. Russet potatoes are a good choice if you enjoy a particularly soft, melting texture. Yukon Gold potatoes are another favourite of mine. They have a lovely buttery flavour, hold their shape reasonably well, and produce beautifully tender layers.
The important thing is to avoid potatoes that remain excessively firm after prolonged cooking. We aren't trying to create a stack of neatly preserved potato discs. We want delicate layers that yield easily to a fork.
And this brings us to something that sounds rather insignificant. The thickness of the slices.
The Second Stage: Why the Thickness of the Potatoes Matters
A potato sliced too thickly takes longer to cook. A potato sliced too thinly can lose its structure and become difficult to distinguish from its neighbours.
For Dauphinoise, I prefer slices about ⅛ inch (2 to 3 mm) thick. Thin enough to become tender and absorb the cream. Thick enough to retain those lovely individual layers.
A mandoline makes this particularly easy. Although I would strongly recommend using the safety guard. I've spent enough years in professional kitchens to know that a mandoline has absolutely no interest in whether you're an experienced chef or someone making supper on a Tuesday. It treats everyone with equal enthusiasm.
If you're using a sharp knife instead, simply take your time and aim for reasonably even slices. Consistency matters more than mathematical perfection. When the potatoes are sliced evenly, they cook at approximately the same rate. And that means you won't discover one stubbornly crunchy layer hiding beneath an otherwise beautifully cooked gratin.
The Third Stage: Why You Shouldn't Wash Away the Starch
Here's something that surprises people. When making Potatoes Dauphinoise, I generally avoid rinsing the potatoes after slicing them. Why? Because the starch on the surface is one of our most useful ingredients.
As the potatoes cook, some of their starch absorbs liquid, swells, and helps thicken the surrounding cream. This process is known as starch gelatinisation. It's the same basic principle that helps thicken sauces, custards, and many other familiar dishes.
But here, the thickening happens naturally. We don't need flour. We don't need a roux. And we certainly don't need to introduce a packet of anything claiming to be a potato gratin sauce. The potatoes do the work themselves.
If you rinse the slices thoroughly, you remove some of that surface starch. The dish may still turn out beautifully, but you've discarded something that could have helped bring the cream and potatoes together. So once the potatoes are peeled and sliced, I like to get them into the cream without unnecessary delay. The starch stays where it belongs. In the dish.
The Fourth Stage: Infusing the Cream with Garlic
Now we come to the cream. And this is where the kitchen begins to smell rather wonderful. Cream provides the richness that makes Dauphinoise so luxurious. But cream on its own can be a little one dimensional. It needs seasoning. And it needs a little fragrance.
Garlic is the traditional companion. Some cooks simply rub the baking dish with a cut clove of garlic. Others gently warm crushed garlic in the cream before assembling the gratin. I rather like the second approach. Gently heating the cream with garlic allows its flavour to spread more evenly throughout the dish.
You can add a little thyme if you wish. Perhaps a small grating of nutmeg. But I would exercise restraint. Potatoes Dauphinoise is a dish built around the flavour of potatoes and cream. We don't want so many herbs and spices that the potatoes become supporting actors in their own production.
Warm the cream gently. There's no need for a vigorous boil. We simply want the garlic to release its fragrance and the cream to become pleasantly warm.
And don't forget the salt. Potatoes need proper seasoning. A beautifully golden gratin that's bland in the middle is a particularly disappointing thing.
The Fifth Stage: When Potato Starch Begins to Transform the Cream
This is where the real magic happens. As the assembled gratin warms in the oven, the potatoes gradually absorb heat. Their starch granules begin taking up moisture from the surrounding liquid. As the temperature rises, those granules swell and gelatinise. Some starch also moves into the cream, helping it become thicker.
At the same time, water slowly evaporates from the dish. The combined effect is a sauce that becomes increasingly concentrated and creamy. What began as relatively loose cream gradually develops a consistency that clings to the potato slices.
And because the potatoes are arranged in thin layers, the sauce works its way between them. The result is wonderfully delicate. Each slice becomes tender, while the cream settles into the spaces between the potatoes.
This is one reason I don't like to rush the cooking process. If the oven is too hot, the surface can brown long before the potatoes underneath have softened. You end up with a magnificent looking dish that conceals a rather disappointing surprise. Golden on top. Crunchy in the middle. Not quite the effect we're after.
A moderate oven allows the heat to penetrate gradually, giving the potatoes time to soften while the sauce thickens.
The Sixth Stage: Why Gentle Cooking Produces Better Potatoes
Potatoes are made up of cells held together by structural materials, including pectin. As they cook, those structures gradually soften. This is what allows a fork to pass through a properly cooked potato with very little resistance.
But the process takes time. Especially when the potatoes are layered closely together. The cream surrounding them also affects how heat moves through the dish. A deep gratin will generally take longer to cook than a shallow one. And a ceramic baking dish may behave differently from a metal one.
This is why I prefer to judge Dauphinoise by tenderness rather than relying entirely on the clock. A thin knife should slide through the centre of the dish without meeting noticeable resistance.
If the top is browning too quickly while the potatoes remain firm, cover the dish loosely with foil and continue cooking. That gives the interior more time without allowing the surface to become excessively dark. There's no shame in using foil. It's considerably better than presenting your guests with a dish that resembles a toasted roof tile.
The Seventh Stage: How the Golden Crust Develops
Now for my favourite part. The crust.
As the gratin bakes, the surface gradually loses moisture. The cream becomes more concentrated, and the exposed potato edges begin to dry slightly. As the surface temperature rises, browning reactions create the beautiful golden colour and savoury aromas we associate with a properly baked gratin.
The Maillard reaction plays a role here, particularly where milk proteins and sugars are present. There may also be some caramelisation of sugars at sufficiently high surface temperatures. The result is a crust that's deeply flavoured, lightly crisp in places, and wonderfully fragrant.
But there's an important distinction. We're looking for golden brown. Not dark brown with an alarming suggestion of smoke.
If the potatoes are tender but the surface remains pale, you can increase the oven temperature briefly toward the end of cooking. Or use the broiler for a minute or two. Just keep a close eye on it. A beautiful gratin can go from golden to regrettable with surprising speed.
The Eighth Stage: The Question of Cheese
Now, before someone writes to tell me I've forgotten the Gruyère, we should address the matter of cheese.
Traditional Gratin Dauphinois generally doesn't contain it. The classic dish relies on potatoes, cream, milk, garlic, and seasoning. Its richness comes from the dairy and the starch released by the potatoes. Add cheese, and you've moved toward a different style of potato gratin. Still delicious. But not quite the same thing.
And I have absolutely no objection to cheese. A little Gruyère can produce a wonderfully savoury crust. Parmesan brings its own salty complexity. But if we're making a traditional Dauphinoise, I prefer to let the potatoes and cream speak for themselves.
Sometimes the most impressive thing a cook can do is resist adding another ingredient. Although I appreciate that's a difficult philosophy to maintain when there's a perfectly good wedge of Gruyère sitting in the refrigerator.
The Ninth Stage: Why You Must Let the Gratin Rest
This may be the most difficult part of the entire recipe. The potatoes are tender. The surface is golden. The cream is bubbling gently around the edges. And the kitchen smells magnificent. Naturally, everyone wants to eat. Immediately.
But I would encourage you to wait. Just a little. As the gratin rests, the bubbling settles, the temperature becomes more even, and the thickened sauce begins to firm slightly. This makes the potatoes easier to serve. Instead of a loose mixture of slices and hot cream, you get a more cohesive portion with those beautiful layers still visible.
I generally allow the dish to rest for around 10 to 15 minutes before serving. Long enough for everything to settle. Not so long that the potatoes lose their wonderful warmth. And if anyone complains about the delay, I find that placing a basket of bread on the table usually buys a few minutes.
How Do You Know When Potatoes Dauphinoise Are Ready?
I look for four things.
First, the potatoes should be completely tender. A thin knife inserted into the centre should pass through the layers easily.
Second, the cream should have thickened into a silky sauce that coats the potatoes rather than sitting as a watery puddle at the bottom of the dish.
Third, the surface should be beautifully golden, with a few deeper brown patches where the cream and potato edges have toasted.
And finally, the gratin should smell rich, buttery, and gently garlicky. Not aggressively garlicky. Not burnt. Just warm, comforting, and rather irresistible. When those four things come together, your Dauphinoise is ready.
Why Potatoes Dauphinoise Are Worth the Patience
What I love most about Potatoes Dauphinoise is that the dish asks for so little. A few good potatoes. Some cream. Garlic. Butter. Salt and pepper. And enough time for everything to become something greater than the sum of its parts.
There are no complicated sauces to master. No elaborate techniques. Just an understanding of how starch behaves, how potatoes soften, and how gentle heat transforms cream into something beautifully rich.
And that's what makes the dish so rewarding. You begin with ingredients that most of us have seen a thousand times. Then, through careful slicing, gentle cooking, and a little patience, you create something that feels genuinely special.
I love serving Dauphinoise alongside roast beef, a beautifully cooked steak, or a simple roast chicken. But I've also been known to enjoy a generous spoonful on its own. Standing in the kitchen. With the serving spoon. While pretending to check whether it's still warm. An entirely legitimate culinary responsibility, as far as I'm concerned.
Common Mistakes to Avoid
Using milk instead of cream: it can curdle during the long bake
Uneven slices: thick pieces stay firm while thin ones turn to mush
Waxy potatoes: they won’t release the starch that binds the sauce
Cutting in too soon: the sauce needs its rest to set
What to Serve with Potatoes au Gratin
Prime rib or roast beef
Roast lamb or glazed ham
Roast or grilled chicken
A crisp green salad with a sharp vinaigrette
Roasted asparagus or green beans
How to Store
Fridge: cover and refrigerate leftovers for up to 3 days.
Reheat: warm covered in a 325°F oven until hot through, then uncover for the last few minutes to re-crisp the top.
Make ahead: bake it a day ahead, cool, cover and refrigerate, then reheat as above.
Frequently Asked Questions
What is the difference between Potatoes au Gratin and Potatoes Dauphinoise?
Potatoes au gratin is a broad term for potatoes baked with a browned topping, often including cheese. Traditional French Gratin Dauphinois is generally made with thinly sliced potatoes, cream or milk, garlic, and seasoning, without cheese.
What are the best potatoes for Dauphinoise?
Yukon Gold potatoes are an excellent choice because of their creamy texture and buttery flavour. Russet potatoes also work well, producing a particularly soft gratin. Both release starch that helps thicken the cream.
Should you boil potatoes before making Dauphinoise?
Not necessarily. Traditional Dauphinoise can be made with raw, thinly sliced potatoes that cook slowly in cream in the oven. Some recipes briefly simmer the potatoes in the cream before baking to shorten the oven time and encourage even cooking.
How thin should potatoes be sliced for Dauphinoise?
Aim for slices about ⅛ inch (2 to 3 mm) thick. Evenly sliced potatoes cook at a similar rate and create delicate layers throughout the gratin.
Should you rinse potatoes before making Dauphinoise?
It's generally better not to rinse the potatoes after slicing. Their natural surface starch helps thicken the cream as the gratin cooks.
Why are my Dauphinoise potatoes watery?
Watery Dauphinoise can result from insufficient cooking, too much liquid, or potatoes that haven't released enough starch to thicken the sauce. Allow the gratin to cook until the potatoes are tender and the cream has reduced and thickened. Resting the dish before serving also helps.
Why are my Dauphinoise potatoes still hard?
The potato slices may be too thick, the baking dish may be particularly deep, or the cooking time may have been too short. Cover the dish loosely with foil if the surface is already golden, and continue baking until a knife passes easily through the centre.
Do traditional Potatoes Dauphinoise contain cheese?
Traditional Gratin Dauphinois is generally prepared without cheese. The richness comes from the potatoes, cream, milk, and butter. Cheese is common in many modern potato gratin recipes, but it isn't essential to Dauphinoise.
Can you make Potatoes Dauphinoise ahead of time?
Yes. You can bake the dish ahead, cool it promptly, and refrigerate it. Reheat it covered in the oven until thoroughly hot, removing the foil near the end if you want to refresh the golden surface.
Can you freeze Potatoes Dauphinoise?
You can, although the texture may change. Cream based sauces can separate slightly after freezing, and the potatoes may become softer. For the best texture, I prefer making Dauphinoise fresh or preparing it a day ahead and refrigerating it.
What temperature should you bake Potatoes Dauphinoise?
A moderate oven, around 325°F to 350°F (160°C to 180°C), works well for many recipes. The ideal temperature depends on the depth of the dish and whether the potatoes have been precooked. Tenderness is a more reliable guide than cooking time alone.
What should you serve with Potatoes Dauphinoise?
Potatoes Dauphinoise are wonderful alongside roast beef, roast chicken, lamb, steak, or baked ham. They also pair beautifully with green vegetables such as asparagus, green beans, and roasted Brussels sprouts.
How do I make it more like a classic dauphinoise?
Skip the cheddar and Monterey Jack, rub the dish with a cut garlic clove, and warm the cream with garlic and a sprig of thyme before pouring it over. A little Gruyère on top is optional.
You Might Also Like
Try my Prime Rib Roast, Creamy Mashed Potatoes, perfect roast chicken, and Apricot Glazed Ham. Planning a holiday feast? It's on my Thanksgiving menu too.
For a special dinner, serve it alongside my Beef Bourguignon.
Recommended Equipment
Make this recipe easier with the right tools: Ceramic Baking Dish Set, Sauce Pan, Chef's Knife, Rasp Grater.
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