Description
Deliciously creamy and cheesy scalloped potatoes layered with caramelized onions, perfect for family dinners and holiday gatherings.
Ingredients
Scale
- 2 pounds Yukon Gold potatoes, thinly sliced
- 2 cups Gruyere cheese, shredded
- 2 medium yellow onions, thinly sliced
- 4 tablespoons unsalted butter, divided
- 3 garlic cloves, minced
- 3 tablespoons all-purpose flour
- 2 cups whole milk
- 1 cup heavy cream
- 1 teaspoon Dijon mustard
- 1 tablespoon fresh thyme, chopped (optional)
- Salt and freshly ground black pepper to taste
Instructions
- Preheat your oven to 375°F (190°C).
- Caramelize the onions: Melt 2 tablespoons of butter in a large skillet over medium-low heat. Add the sliced onions with a pinch of salt, stirring occasionally for about 30-35 minutes until soft and golden.
- Prepare the Gruyere sauce: In a medium saucepan, melt the remaining 2 tablespoons of butter over medium heat. Stir in the minced garlic for 30 seconds until fragrant. Whisk in the flour and cook for 1-2 minutes.
- Gradually whisk in the whole milk and heavy cream until the sauce thickens (about 5-7 minutes). Remove from heat and stir in Gruyere cheese until melted and smooth. Add Dijon mustard, thyme, salt, and pepper to taste.
- Slice the potatoes into thin, even rounds about 1/8 inch thick. Rinse the slices in cold water and pat dry.
- Butter the baking dish lightly. Layer the potatoes, caramelized onions, and Gruyere sauce, repeating layers until all ingredients are used. Finish with a layer of sauce and extra cheese on top.
- Bake uncovered for 50-60 minutes until the potatoes are tender and the top is golden brown. Cover loosely with foil if needed.
- Let it rest for 10 minutes before serving.
Notes
Use Yukon Gold potatoes for the best flavor. Don’t rush the caramelization of the onions for maximum sweetness.
- Prep Time: 15 minutes
- Cook Time: 60 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: French
Nutrition
- Serving Size: 1 serving
- Calories: 450
- Sugar: 6g
- Sodium: 500mg
- Fat: 24g
- Saturated Fat: 14g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 45g
- Fiber: 4g
- Protein: 11g
- Cholesterol: 60mg