Description

Creamy, comforting scalloped potatoes layered with a rich, savory sauce and topped with melted Cheddar and Parmesan. A classic side dish perfect for holidays and family dinners.

Ingredients

3 pounds potatoes, peeled and thinly sliced (1/8 inch)

4 tablespoons unsalted butter

4 cloves garlic, minced

1/2 medium onion, diced

3 tablespoons all-purpose flour

2 cups milk, room temperature

1/2 teaspoon ground mustard

1/4 teaspoon cayenne pepper

1 teaspoon salt

1/2 teaspoon black pepper

1 1/2 cups shredded Cheddar cheese

1 cup shredded Parmesan cheese

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Instructions

Preheat oven to 375°F (190°C) and grease a 9×13-inch baking dish.
Peel potatoes and slice into thin, even 1/8-inch slices.
Melt butter in a medium-large saucepan over medium-high heat. Sauté garlic and onion until onions are translucent.
Add flour and stir continuously for about 3 minutes until bubbly.
Gradually pour in milk while stirring. Add mustard, cayenne, salt, and pepper.
Simmer for about 5 minutes, until the sauce thickens. Remove from heat.
Layer half of the potatoes evenly in the prepared baking dish.
Pour half the sauce over the potatoes and spread evenly. Top with half the Cheddar and half the Parmesan.
Repeat with remaining potatoes, sauce, and cheeses.
Cover with foil and bake for 35 minutes.
Remove foil and bake an additional 25–30 minutes, until potatoes are tender and top is golden.
Let rest for 15 minutes before serving.

Notes

Swap Cheddar for Gruyere for a nuttier flavor.

Add fresh thyme or rosemary to the sauce for herbal depth.

Increase cayenne or add paprika for extra heat.

Replace some milk with heavy cream for a richer dish.

Prep Time: 20 minutes
Cook Time: 1 hour
Category: Side Dish
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 serving
Calories: 320
Sugar: 4g
Sodium: 480mg
Fat: 16g
Saturated Fat: 10g
Unsaturated Fat: 5g
Trans Fat: 0g
Carbohydrates: 32g
Fiber: 3g
Protein: 12g
Cholesterol: 45mg