Cheesy Potato Casserole

Bahan-bahan (6 porsi)

• 32 ounces shredded potatoes (defrosted if frozen)
• 10 ½ ounces condensed cheddar cheese soup (or cream of mushroom soup)
• 1 cup shredded sharp cheddar cheese
• ⅔ cup sour cream
• ¼ cup butter (melted)
• ¼ cup milk
• ½ teaspoon garlic powder
• ½ teaspoon onion powder
• 1 cup cornflakes
• 2 tablespoons melted butter