Classic Au Gratin Potatoes With Cheese Recipe

Ingredients (10)

• 4 cups diced potatoes (about 1/2-inch dice)
• 7 tablespoons butter, (divided)
• 1/3 cup all-purpose flour
• 1 3/4 cup milk (whole or low-fat)
• 1/8 teaspoon freshly ground black pepper
• 3/4 teaspoon kosher salt
• 1 1/2 cups (6 ounces) shredded sharp cheddar cheese (divided)
• 1/2 cup fresh grated Parmesan or Peccorino Romano cheese (divided)
• 1 cup soft bread crumbs
• Optional: dash of nutmeg