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Gruyere Potatoes Au Gratin It always starts simple. Just a bowl of thinly sliced potatoes, nothing fancy yet — but this is where the magic begins. Each slice is a promise of comfort, slow cooking, and that perfect bite we’re all waiting for. Sometimes the best dishes come from the most basic ingredients

Gruyere Potatoes Au Gratin

Creamy, cheesy, and comforting – these Gruyere Potatoes Au Gratin are the ultimate side dish, perfect for both casual family dinners and festive occasions.
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Prep Time 30 minutes
Cook Time 45 minutes
Total Time 1 hour 15 minutes
Servings: 6
Course: Dinner, Side Dish
Cuisine: American
Calories: 439
Ingredients Method Nutrition Notes

Ingredients
  

  • 5-6 large Yukon gold potatoes peeled and thinly sliced
  • 3 tablespoons unsalted butter for making the sauce
  • 3 tablespoons all-purpose flour for thickening the sauce
  • 2 cups milk whole milk recommended for creaminess
  • 1 teaspoon salt to season the sauce
  • ½ teaspoon garlic powder for flavor
  • ½ teaspoon onion powder for flavor
  • ½ teaspoon dried oregano adds herby note
  • ½ teaspoon dried thyme adds herby note
  • ¼ teaspoon black pepper to taste
  • 2 cups Gruyere cheese grated, for creamy and rich sauce
  • ½ cup Parmesan cheese grated, for flavor and topping

Method
 

  1. Preheat your oven to 400°F (200°C). Grease a 9×13-inch baking pan and set it aside. prep
  2. Peel the potatoes and thinly slice them using a mandoline or sharp knife. Set aside. prep
  3. In a saucepan, melt 3 tablespoons butter over medium heat. Add the flour and whisk for about one minute until smooth. mix
  4. Gradually add 2 cups of milk, whisking until the mixture is smooth and there are no lumps. mix
  5. Stir in 1 teaspoon salt, ½ teaspoon garlic powder, ½ teaspoon onion powder, ½ teaspoon dried oregano, ½ teaspoon dried thyme, and ¼ teaspoon black pepper. Bring the sauce to a simmer. cook
  6. Continue stirring and simmer for about 10 minutes, until the sauce thickens enough to coat the back of a spoon. cook
  7. Remove from heat and stir in 1 ½ cups grated Gruyere cheese and ¼ cup grated Parmesan cheese until fully melted and the sauce is smooth. mix
  8. Layer half of the sliced potatoes evenly in the prepared baking pan. Pour half of the cheese sauce over the potatoes. Repeat with the remaining potatoes and sauce. assemble
  9. Sprinkle the top with the remaining ½ cup Gruyere cheese and ¼ cup Parmesan cheese. assemble
  10. Cover the pan with foil and bake at 400°F for 25 minutes. Then uncover and bake for an additional 20-25 minutes, until the potatoes are tender and the top is golden and bubbly. bake
  11. Let the dish sit for 10 minutes after baking to allow the sauce to set. finish

Nutrition

Serving: 250gCalories: 439kcalCarbohydrates: 32gProtein: 22gFat: 25gSaturated Fat: 15gPolyunsaturated Fat: 1gMonounsaturated Fat: 7gTrans Fat: 1gCholesterol: 77mgSodium: 714mgPotassium: 761mgFiber: 3gSugar: 5gVitamin A: 798IUVitamin C: 28mgCalcium: 660mgIron: 2mg

Notes

The rich and creamy sauce is what makes this dish! Be sure to simmer it long enough to thicken to the right consistency – thick enough to coat a spoon, but not too thick. If you have any leftovers, store them in an airtight container in the fridge for 2-3 days.

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