Name: Crispy Parmesan and Gruyère Potato Gratin Recipe
Prep time: 20 min
Cook time: PT-494087H17M30S
Total time: PT-494087H17M30S
Cuisine: French-inspired
Ingredients: 2 pounds (900 g) Yukon Gold potatoes, thinly sliced; 1 tablespoon butter (for greasing the dish); 1 1/2 cups heavy cream; 1/2 cup whole milk; 2 cloves garlic, minced; 1 teaspoon salt; 1/2 teaspoon black pepper; 1/2 teaspoon dried thyme; 1 1/2 cups shredded Gruyère cheese; 1/2 cup grated Parmesan cheese; 1 tablespoon chopped fresh parsley (optional, for garnish)

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I love making this crispy Parmesan and Gruyère potato gratin when I want a rich, comforting side dish that feels elegant and satisfying. The layers of tender potatoes, creamy sauce, and golden crispy cheese create a combination that I find impossible to resist.

Why You’ll Love This Recipe

I enjoy how this gratin delivers both creamy and crispy textures in every bite. The Gruyère melts beautifully into the potatoes, while the Parmesan forms a golden crust on top. I also appreciate how well this dish pairs with roasted meats, holiday meals, or even a simple salad for a cozy dinner.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

2 pounds (900 g) Yukon Gold potatoes, thinly sliced
1 tablespoon butter (for greasing the dish)
1 1/2 cups heavy cream
1/2 cup whole milk
2 cloves garlic, minced
1 teaspoon salt
1/2 teaspoon black pepper
1/2 teaspoon dried thyme
1 1/2 cups shredded Gruyère cheese
1/2 cup grated Parmesan cheese
1 tablespoon chopped fresh parsley (optional, for garnish)

Directions

I start by preheating the oven to 190°C (375°F) and greasing a baking dish with butter.

In a saucepan over medium heat, I combine the heavy cream, milk, minced garlic, salt, black pepper, and thyme. I warm the mixture gently for a few minutes without bringing it to a boil.

Next, I arrange half of the sliced potatoes in the prepared baking dish, slightly overlapping them. I pour half of the cream mixture over the potatoes and sprinkle half of the Gruyère cheese on top.

I repeat the layers with the remaining potatoes, cream mixture, and Gruyère cheese. Then I finish by sprinkling the Parmesan cheese evenly over the top.

I cover the dish with foil and bake for about 40 minutes. After that, I remove the foil and continue baking for another 20–25 minutes until the top becomes golden brown and crispy and the potatoes are tender.

I let the gratin rest for about 10 minutes before serving, then I garnish it with fresh parsley if I want extra color and freshness.

Servings and timing

I usually get about 6 servings from this recipe. It takes me around 20 minutes to prepare and about 60–65 minutes to bake, plus resting time.

Variations

I sometimes add caramelized onions between the layers for extra flavor. If I want a slightly lighter version, I replace part of the cream with additional milk. I also enjoy experimenting with different cheeses like sharp cheddar or fontina for a new twist.

storage/reheating

I store leftovers in an airtight container in the refrigerator for up to 4 days. When reheating, I warm the gratin in the oven at a low temperature to help maintain the crispy top. I occasionally use the microwave for convenience, though the crust becomes softer.

FAQs

Can I use another type of potato?

I prefer Yukon Gold potatoes because they stay creamy, but russet potatoes also work well.

Why is my gratin watery?

I make sure to slice the potatoes evenly and avoid underbaking, which helps the sauce thicken properly.

Can I prepare this dish ahead of time?

I can assemble the gratin ahead and refrigerate it before baking.

What does Gruyère cheese add to the dish?

I find Gruyère rich, nutty, and excellent for melting, which gives the gratin a deep flavor.

How do I get the top extra crispy?

I bake uncovered during the final part of cooking and sometimes broil it briefly for more color and crunch.

Conclusion

I find this crispy Parmesan and Gruyère potato gratin to be the ultimate comfort side dish. It’s creamy, cheesy, and beautifully golden on top, making it perfect for special occasions or whenever I want something warm and indulgent.