A creamy, indulgent potato gratin topped with crispy Parmesan and Gruyere cheese for a golden, delicious finish. Perfect as a side dish for any occasion.
Author:Beth
Prep Time:20 minutes
Cook Time:1 hour 5 minutes
Total Time:1 hour 25 minutes
Yield:8 servings 1x
Category:Side Dish
Method:Baking
Cuisine:French
Diet:Vegetarian
Ingredients
Scale
4 large russet potatoes, peeled and thinly sliced
1 cup heavy cream
1 cup whole milk
2 tablespoons unsalted butter
2 cloves garlic, minced
1 teaspoon fresh thyme leaves
1/2 teaspoon salt, or to taste
1/4 teaspoon freshly ground black pepper
1 cup grated Parmesan cheese
1 cup grated Gruyere cheese
1/2 cup breadcrumbs (optional, for extra crunch)
Instructions
Preheat oven to 375°F (190°C). Butter a 9×13-inch baking dish and set aside.
In a medium saucepan, melt butter over medium heat. Add garlic and thyme, cooking for 1–2 minutes until fragrant.
Pour in heavy cream and milk, and bring to a simmer. Season with salt and pepper. Stir to combine and remove from heat.
Layer the sliced potatoes in the prepared baking dish, slightly overlapping each slice. Pour half of the cream mixture over the potatoes.
Sprinkle half of the grated Parmesan and Gruyere cheese over the potatoes.
Repeat layering with the remaining potatoes, cream mixture, and cheeses.
If using, sprinkle breadcrumbs on top for added crunch.
Cover the dish with foil and bake for 45 minutes. Remove the foil and bake for an additional 20 minutes, until potatoes are tender and the top is golden brown and crispy.
Let cool for 5 minutes before serving. Garnish with extra thyme, if desired.
Notes
For extra richness, you can substitute some of the milk with more heavy cream.
For a smoky flavor, try adding a little smoked paprika to the cream mixture.
If you prefer a more decadent gratin, top with more cheese and breadcrumbs for an extra crispy crust.
This dish can be made ahead: assemble the gratin, cover, and refrigerate for up to a day before baking.