Cheesy Potato Gratin

Give me all the gratins please!! This Cheesy Potato Gratin is one for the record books and you need it STAT.

Cheesy Potato Gratin from (@Whatsgabycookin)

I mean, what’s not to love about thinly sliced potatoes layered with caramelized onions, heavy cream, tons of cheese, herbs, salt and pepper? It’s basically the most magical side dish on the planet. And I am NOT to be left alone with it.  Somehow it disappears very quickly and I don’t want to be held accountable.

This will be making an appearance on my holiday dinner party table this year and I am 100% confident in saying you should be doing the same. TRUST. It’s the best. Potato Gratin for EVERYONE.

Cheesy Potato Gratin from (@Whatsgabycookin)

Cheesy Potato Gratin

Yield: Serves 8

Cheesy Potato Gratin


  • 2 pounds Yukon Gold potatoes
  • Kosher salt and freshly ground pepper
  • 1 tablespoons olive oil
  • 1 yellow onion, diced
  • 1 1/2 cups heavy cream
  • 1 cup shredded Gruyère cheese
  • 3/4 cup parmesan cheese
  • 1/4 cup crème fraîche
  • Fresh thyme for garnish


  1. Preheat an oven to 400°F. Grease a 9-inch baking dish or large oven proof skillet with butter or non-stick cooking spray.
  2. Using a mandoline, cut the potatoes into slices, 1/8 inch thick. Arrange the potato slices, slightly overlapping, on the bottom of the baking dish and season with salt and pepper.
  3. In a skillet over medium heat, heat the olive oil. Add the onion and sauté until starting to caramelize, about 6-7 minutes. Add the cream and bring to a simmer. Simmer until thickened slightly, about 5 minutes, making sure to stir to prevent sticking. Stir in 3/4 cup of the gruyere cheese and all of the parmesan and cook until melted. Remove the mixture from the heat and stir in the crème fraîche. Season with salt and pepper.
  4. Pour the cream mixture evenly on top of the potatoes and sprinkle the remaining 1/4 cup of Gruyere cheese evenly on top. Bake until the mixture is golden brown and bubbly and the potatoes are tender, about 1 hour. Let the gratin rest for about 15 minutes. Garnish with thyme and serve immediately.

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  1. Mmmm. I think these will be a feature on my holiday table as well. I love everything about this – even the pan you have them in!

  2. I cannot wait to make this for a bday dinner on Friday night! I just read the recipe, and am I supposed to layer potatoes then a portion of the melted cheese/cream/onion mixture and repeat? The recipe reads like I’m to layer all of the potatoes and then pour all of the mixture on top, but I’m afraid I’m misunderstanding the steps.


  3. Hi, so excited to try! To make in advance, would you recommend completely pre-baking, par-baking or assembling then covering and put in fridge for the next day (would the potatoes brown if not at least partially baked?)?

  4. The two times I’ve tried making a gratin, the cream breaks and it’s a watery mess. Does mekting the cheese in the cream help prevent this? Thanks!

    1. have you tried this recipe? Or the cream breaks in other recipes you’ve tried? I’ve never had an issue with this one

  5. Can this be easily doubled or tripled? If so, would you double all ingredients? I do a large party every year (plan for 50 people) and am needing some new ideas this year.

  6. Oops, I meant to say would this dish work in a 9×13 pan? Sorry for the error and thank you for your quick response.

  7. Hi Gaby!

    Would it work to prep this entirely and then wait 2 hours before baking it in the oven? I want to make for Christmas lunch but am not at my house and don’t want to prep it away from home. It would sit with the creme & cheese mixture for a couple of hours.

      1. Awesome! Thank you!
        We just made your 5 cheese penne for my moms birthday dinner and it was the HUGEST hit!! Loooooved it!!!!

  8. Gaby, This is the best potato gratin and is a huge hit of the family. We have had it with beef roasts, steaks and Pork Roasts. All fabulous! I have melted butter in a cast iron pan and then laid my potatoes on it to provide a crispness. It was fabulous.

    This is our go to and I greatly appreciate you sharing! Your recipe has been shared to so many of our friends and family!

    Your cookbook is also my go-to present for white elephants gift exchanges and birthday gifts with a bottle of wine.


  9. HOLY GOODNESS was this so darn good! The family polished every bit of this away. I did sub emmanthal for the gruyere. This will be a staple dish for now and forever!

  10. We made this with beef tenderloin on Christmas Day. It was a huge hit and will now be our go to potato gratin recipe! Super easy and absolutely delicious!!

  11. Can’t wait to try this!! I am making it for our neighborhood monthly cookbook share. This month we are featuring all recipes from your cookbook!! Love everything I see and am flipping between this and the Chicken Chili Verde!! Which one should I make and bring!!

  12. I made these for Christmas on a whim. The family literally took spoons after the meal was done and finished it off. They were so darn good, and we’re making again in a few weeks for easter. Ya’ll this WILL NOT disappoint ! Spoil your family and loved ones with this recipe!!

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