Creamy Oven Baked Mashed Potatoes

Bahan-bahan (12 porsi)

• 10 large Russet or Yukon Gold potatoes ((peeled, washed & cut in half))
• 8 ounces cream cheese
• 1 cup sour cream
• garlic salt, (to taste)
• 1 tablespoon butter, (chopped into small pieces)
• chopped chives and paprika for garnish, (optional)