Creamy and indulgent, these Cheesy Scalloped Potatoes are the ultimate comfort food side dish. Layers of thinly sliced potatoes smothered in a rich cheese sauce, baked to golden perfection.
2 pounds russet or Yukon gold potatoes (peeled and thinly sliced)
2 tablespoons unsalted butter, 2 tablespoons all-purpose flour, 2 cups whole milk, 1 cup heavy cream, 2 cloves garlic (minced), 1 teaspoon salt, 1/2 teaspoon black pepper, 1/2 teaspoon onion powder, 1 1/2 cups shredded sharp cheddar cheese, 1/2 cup shredded Gruyère or mozzarella cheese, chopped fresh parsley for garnish (optional)