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Close up of a slice of gruyere au gratin potatoes.

Gruyere Au Gratin Potatoes

Gruyere Au Gratin Potatoes is the classic cheesy layered potato casserole with rich Gruyere cheese, creamy bechamel, and onions.
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Course: Side Dish
Cuisine: French
Keyword: au gratin potatoes, potato side dish
Prep Time: 20 minutes
Cook Time: 40 minutes
Total Time: 1 hour
Servings: 6
Calories: 107kcal
Author: Kate | You Say Potatoes

Equipment

  • Casserole Dish
  • Pot

Ingredients

  • 2 pounds potatoes russet, Idaho etc...
  • 4 tablespoons butter
  • 4 tablespoons all-purpose flour
  • 1 cup milk
  • ½ onion finely chopped
  • 2 cloves garlic minced
  • ½ teaspoon each salt and pepper
  • 1 ½ cups shredded gruyere cheese

Instructions

  • Preheat the oven to 375°F (190°C). Grease a large (2 quart) baking dish with butter.
  • Peel the potatoes and cut them into thin slices.
  • Melt the butter in a small pot over medium heat. Add the flour and whisk constantly for 1-2 minutes until it turns into a thick paste.
  • Gradually pour in the milk, whisking constantly to prevent lumps. Add the onion, garlic, salt, and pepper and continue to whisk until the mixture thickens.
  • Remove the saucepan from heat and add half the grated Gruyere cheese, whisking until melted and combined.
  • Arrange a layer of sliced potatoes in the prepared baking dish. Pour a layer of the cheese sauce over the potatoes, making sure to cover them completely. Repeat the process, layering the potatoes and cheese sauce until all the potatoes and sauce are used up.
  • Sprinkle the remaining Gruyere cheese on top.
  • Bake the dish for 45-50 minutes, until the potatoes are tender and the cheese is golden brown and bubbly on top.
  • Let the dish cool for a few minutes before serving.
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Nutrition

Calories: 107kcal | Carbohydrates: 7g | Protein: 2g | Fat: 8g | Saturated Fat: 5g | Polyunsaturated Fat: 0.3g | Monounsaturated Fat: 2g | Trans Fat: 0.3g | Cholesterol: 22mg | Sodium: 270mg | Potassium: 88mg | Fiber: 0.3g | Sugar: 2g | Vitamin A: 311IU | Vitamin C: 1mg | Calcium: 57mg | Iron: 0.3mg

The nutritional information provided is approximate and can vary depending on several factors, so is not guaranteed to be accurate. Please see a registered dietician for special diet advice.