
Gruyere Potatoes Au Gratin
Ingredients
- 5-6 large Yukon gold potatoes
peeled and thinly sliced
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 2 cups milk
- 1 teaspoon salt
- 1/2 teaspoon garlic powder
- 1/2 teaspoon onion powder
- 1/2 teaspoon dried oregano
- 1/2 teaspoon dried thyme
- 1/4 teaspoon black pepper
- 2 cups Gruyere cheese
grated
- 1/2 cup Parmesan cheese
grated
Directions
- 1
Preheat the oven to 400˚F, grease a 9x13-inch baking pan and set aside.
- 2
Peel the potatoes and thinly slice them using a mandoline. Then set aside.
- 3
In a saucepan, melt 3 tbsp butter on a medium heat. Add 3 tbsp all-purpose flour and whisk for one minute until well combined. Then add 2 cups milk and whisk until all the ingredients are well combined and there are no clumps.
- 4
Then add the seasoning (1 tsp salt, ½ tsp garlic powder, ½ tsp onion powder, ½ tsp dried oregano, ½ tsp dried thyme, ¼ tsp black pepper).
- 5
Bring the mixture to simmer and continue cooking constantly stirring for about 10 minutes or until the sauce thickens and coats a spoon.
- 6
When done, remove from the heat and add 1 ½ cups grated Gruyere cheese and ¼ cup grated Parmesan cheese. Fold it in until the cheese is melted and well combined.
- 7
Take the prepared pre-greased baking pan. Evenly layer half of the sliced potatoes and pour over half of the cheesy sauce. Then layer the rest of the potatoes over and pour the rest of the cheesy sauce on top, making sure it’s all evenly spread and covers the potatoes.
- 8
Sprinkle over the rest of the cheese (1/2 cup grated Gruyere cheese and ¼ cup grated Parmesan cheese).
- 9
Cover with foil and bake at 400˚F for 25 minutes. Then uncover and continue baking for another 20-25 minutes or until the potatoes are tender andthe cheese gets golden/brown color.
- 10
When done, take the baking pan out of the oven. At first, it might look like the sauce it too liquid and the butter separates. Just let it sit on the counter for 10 minutes, until the sauce sets and binds everything together.
- 11
Serve and enjoy!

Gruyere Potatoes Au Gratin
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About this Recipe
Craving the ultimate comfort food that elevates any meal? These Gruyere Potatoes Au Gratin offer a rich, creamy, and undeniably cheesy experience perfect for both simple family dinners and fancy holiday gatherings.
This recipe truly works because it’s designed to be foolproof, ensuring perfectly tender, thin-sliced Yukon gold potatoes enveloped in a luxurious cheesy sauce every time. The careful blend of rich Gruyere and salty Parmesan creates a depth of flavor that sets this classic side dish apart.
What you can expect is a symphony of textures and tastes. Imagine fork-tender potato slices, delicately infused with aromatic garlic powder, onion powder, dried oregano, and thyme, all swimming in a velvety smooth sauce. Each bite delivers that irresistible combination of savory cheese and hearty potatoes, with a golden, bubbly crust from the baked cheese on top. It’s a wonderfully satisfying dish that feels both indulgent and comforting.
While this recipe shines with its specified ingredients, its naturally vegetarian nature makes it a versatile complement to any main course. You can consider adjusting the balance of the dried spices—oregano, thyme, garlic, and onion powder—to your personal taste preferences, perhaps emphasizing one over another for a subtle flavor shift.
Serve this impressive Gruyere Potatoes Au Gratin hot, straight from the oven, as a decadent side dish. It pairs beautifully with roasted meats, poultry, or a simple green salad, making any meal feel special.

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