Move over scalloped potatoes, this rich and creamy Pommes Dauphinois AKA French Potato Gratin is the king of potato casseroles! Kissed with thyme and topped with nutty Gruyere cheese, this gratin is perfect for holidays, Sunday family dinners, and more.

I’m usually lazy when it comes to adding potatoes to the menu. Baked or sliced and fried are my fallback methods. But some meals call for a more gourmet treat, like this Cheesy Potato Casserole

French Potato Gratin on a small white plate with a sprig of thyme

Why You’ll Love this Cheesy Potato Casserole

  • It’s rich and creamy, flavored with garlic and a touch of thyme.
  • Dorie Greenspan created this recipe, which guarantees deliciousness!
  • Thinly sliced potatoes are bathed in cream and topped with a generous sprinkle of Gruyere cheese. It’s best in small quantities, even though you’ll want seconds and thirds!

French Potato Gratin in a casserole dish

Cheesy Potato Casserole from Around My French Table

I first shared this recipe in 2010 as part of my collaboration with Dorie Greenspan and her cookbook, Around My French Table. It was our 6th week of French Fridays with Dorie. The family was smitten and it became my go-to potato dish for holidays.

Tips for Making This Potato Gratin

This is a rich, satisfying potato dish that’s worthy of any holiday or dinner party! Here are a few tips for making it perfect every time.

  • PRO-Tip: Aim to cut all your potatoes the same thickness. Dorie, the cookbook author, suggests 1/8-inch thick. This ensures they’ll all be cooked and perfectly tender at the same time.
  • Use a mandoline or a benriner to make the slicing more consistent. Make sure to use a handguard
    so you don’t cut yourself!
  • PRO-Tip: Place a sheet pan under the casserole dish when baking. Nothing worse than having to clean burnt-on food from the bottom of your oven when a baking dish overflows! I like to line the baking dish with foil, too, for easy cleanup!
  • Use a knife to check the potatoes for doneness. Pierce a few different potatoes to see if your knife goes in easily. Any resistance and the dish needs more cooking time.
  • Let the dish rest for 10 minutes before serving to allow the steaming cheesy cream cool and thicken a bit.
  • You may not want to mention the amount of cream when you serve this to friends and family. This French Potato Gratin is definitely a special occasion dish. And an exquisite one at that. Just watch your portion sizes!
French Potato Gratin on a round white plate with a bamboo handled fork

Helpful Tools:

These are some of the kitchen items that are useful when making this recipe.

You May Also Like:

If having potatoes at most special meals is a must at your house like at mine, check out my Cheesy Potato Galette,  Hasselback Potatoes with Parmesan and Thyme, this Easy Puffed Potato Casserole (don’t tell anyone, but I use Instant Potato Flakes in this!), and this Hasselback Potato Casserole. Plus, find more recipes to round out your meals in my Side Dish Recipes.

From my blogger friends, these have caught my eye: Loaded Mashed Potato Cakes from Spend with Pennies and Crispy Cheese and Bacon Potatoes from Barefeet in the Kitchen.

French potato gratin featured image

French Potato Gratin

Prep Time 20 minutes
Cook Time 1 hour 10 minutes
Total Time 1 hour 30 minutes
Yield 8 servings

A exquisite creamy potato casserole kissed with garlic, thyme and topped with Gruyere cheese!


  • 1 3/4 cups heavy cream
  • 3 garlic cloves, minced
  • 2 1/4 pounds potatoes, peeled, cut into 1/8-inch-thick rounds (I use Yukon gold or russets)
  • 1 1/2 teaspoons chopped fresh thyme
  • Salt and freshly ground pepper
  • Whole milk, if needed
  • 1 cup grated Gruyère cheese


  1. Preheat to 350°. Generously butter 2 quart baking dish. Place pie dish on rimmed baking sheet. Combine cream and garlic in small saucepan and bring to simmer over low heat. Cover and remove from heat.
  2. Arrange ⅓ of potato rounds, slightly overlapping, in the prepared baking dish; sprinkle with ½ teaspoon thyme and season lightly with salt and pepper. Pour ½ cup garlic cream over. Repeat layering 2 more times with remaining potato, thyme, salt, pepper, and garlic cream. Pour remaining garlic cream over, then ¼ cup milk. Sprinkle cheese over the surface.
  3. Bake gratin until golden on top and potatoes are very tender when a sharp knife is inserted, 1 hour to 1 hour 10 minutes (cover with foil if the top starts browning too quickly). Let the potatoes rest 10 minutes before serving.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 389Total Fat: 26gSaturated Fat: 16gTrans Fat: 1gUnsaturated Fat: 8gCholesterol: 81mgSodium: 201mgCarbohydrates: 30gFiber: 3gSugar: 5gProtein: 11g occasionally offers nutritional information for recipes contained on this site. This information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although attempts to provide accurate nutritional information, these figures are only estimates. Varying factors such as product types or brands purchased can change the nutritional information in any given recipe. Also, many recipes on recommend toppings, which may or may not be listed as optional and nutritional information for these added toppings is not listed. Other factors may change the nutritional information such as when the salt amount is listed “to taste,” it is not calculated into the recipe as the amount will vary. Also, different online calculators can provide different results. To obtain the most accurate representation of the nutritional information in any given recipe, you should calculate the nutritional information with the actual ingredients used in your recipe. You are solely responsible for ensuring that any nutritional information obtained is accurate.


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Lambeau sniffing in the vicinity of the potato gratin
Miss Lambeau’s nose is keenly aware of a delectable dish!
Circa 2010