Twice-Baked Cheesy Potato Casserole Recipe

Ingredients

• 4 large baking potatoes
• 1 cup shredded Cheddar cheese
• 0.5 cup sour cream
• 0.5 cup butter, divided
• 0.25 cup milk
• 0.25 cup cream cheese, softened
• 0.25 cup chopped fresh chives, or to taste
• 0.5 teaspoon salt
• 0.5 teaspoon garlic salt
• 0.5 teaspoon ground black pepper