# What You'll Need:
→ Potatoes
01 - 4.5 lbs Yukon Gold or Russet potatoes, peeled and thinly sliced
→ Dairy
02 - 3 cups whole milk
03 - 1 cup heavy cream
04 - 3 cups sharp cheddar cheese, shredded
05 - 1/2 cup Parmesan cheese, grated
06 - 4 tablespoons unsalted butter
→ Aromatics & Seasonings
07 - 1 medium yellow onion, finely chopped
08 - 3 cloves garlic, minced
09 - 2 tablespoons all-purpose flour
10 - 1 teaspoon salt
11 - 1/2 teaspoon black pepper
12 - 1/2 teaspoon smoked paprika
13 - 1/4 teaspoon cayenne pepper (optional)
→ Garnish
14 - 2 tablespoons fresh chives or parsley, chopped
# Directions:
01 - Preheat oven to 350°F. Grease a 9x13-inch baking dish with butter or nonstick spray.
02 - Melt butter in a large saucepan over medium heat. Sauté onion until translucent, about 4 minutes. Add garlic and cook 1 minute more.
03 - Stir in flour and cook, stirring constantly, until lightly golden, approximately 1 to 2 minutes.
04 - Gradually whisk in milk and cream until smooth. Simmer until sauce thickens, about 5 minutes off heat. Stir in 2 cups cheddar, Parmesan, salt, pepper, smoked paprika, and cayenne until cheese melts and sauce is uniform.
05 - Layer half of the sliced potatoes evenly in prepared dish. Pour half the cheese sauce over potatoes. Repeat with remaining potatoes and sauce.
06 - Sprinkle remaining 1 cup cheddar evenly over the top layer.
07 - Cover tightly with foil and bake for 45 minutes.
08 - Remove foil and continue baking for an additional 25 to 30 minutes until golden brown and potatoes are tender when pierced.
09 - Allow to rest 10 to 15 minutes before serving. Garnish with chopped chives or parsley.
