Ingredients
- 4 russet potatoes (about 2 pounds), peeled and sliced into ¼-inch slices
- 1 yellow onion, sliced into rings
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- ½ teaspoon kosher salt
- 2 cups whole milk, room temperature
- 1 ½ cups mild cheddar cheese, shredded
- Salt and pepper, to taste
Instructions
- Preheat your oven to 400°F and prepare a casserole dish with nonstick cooking spray.
- Layer the sliced potatoes and onion rings in the baking dish.
- In a medium saucepan over medium heat, melt the butter, then whisk in flour and salt for one minute. Gradually add milk, stirring until thickened.
- Stir in cheese until melted and smooth. Pour the sauce over the layered potatoes and cover with aluminum foil.
- Bake for 85-90 minutes until potatoes are fork-tender.
- For an optional golden-brown topping, broil briefly after baking.
- Season with salt and pepper before serving.
- Prep Time: 20 minutes
- Cook Time: 90 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 320
- Sugar: 3g
- Sodium: 650mg
- Fat: 16g
- Saturated Fat: 10g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 40g
- Fiber: 4g
- Protein: 9g
- Cholesterol: 40mg
Keywords: For added flavor, consider incorporating herbs like thyme or rosemary into the cheese sauce. You can experiment with different types of cheese for varied tastes; gouda or mozzarella work well too.
