In a large saucepan, add in the potatoes and cover with water. Bring to a boil over high heat. Reduce heat to medium low; cover partially and simmer for 10-15 minutes or until tender. Drain the potatoes.
Mash potatoes (with a potato masher) with 3 tablespoons of butter. Stir in the cream cheese, sour cream, onion salt, garlic powder and pepper. Continue mashing until smooth. Stir in the remaining butter.
Garnish with fresh chives and butter. Serve warm and enjoy.
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