Description
This comforting dish features layers of creamy, cheesy potatoes and sweet caramelized onions, perfect for chilly evenings and family gatherings.
Ingredients
Scale
- 4 tablespoons unsalted butter, divided
- 2 large yellow onions
- 4 russet potatoes, about 2 pounds
- 2 tablespoons all-purpose flour
- ½ teaspoon kosher salt
- 1 ½ cups whole milk, room temperature
- ¾ cup mild cheddar cheese, shredded, divided
- ¾ cup Gruyère cheese, shredded, divided
- salt, to taste
- chopped parsley, for garnish
Instructions
- Caramelize the onions in a skillet over medium-low heat until golden brown, about 30-45 minutes.
- Preheat the oven to 400°F (200°C) and prepare an 8×8-inch casserole dish with nonstick spray.
- Melt butter in a saucepan, whisk in flour and salt to make a roux, then add milk to create a cheese sauce with cheddar and Gruyère.
- Layer sliced potatoes in the casserole dish, pour cheese sauce over, and add caramelized onions followed by a topping of reserved cheese.
- Cover with foil and bake for 85-90 minutes, then uncover for 10 more minutes to brown the top.
Notes
Be patient while caramelizing the onions to enhance their flavor.
Use room temperature milk for a smoother cheese sauce.
Consider using different cheeses for a variation in flavor.
Nutrition
- Serving Size: 1 serving
- Calories: 450
- Sugar: 4g
- Sodium: 600mg
- Fat: 24g
- Saturated Fat: 14g
- Unsaturated Fat: 9g
- Trans Fat: 0g
- Carbohydrates: 42g
- Fiber: 4g
- Protein: 12g
- Cholesterol: 70mg