Place the cubed potatoes in a large pot and cover with cold water. Add a generous pinch of salt. Bring to a boil over medium-high heat and cook until the potatoes are tender, about 15-20 minutes.

Drain the potatoes and return them to the pot.

Add the butter, milk, garlic powder, salt, and pepper to the potatoes.

Mash the potatoes using a potato masher or a ricer until smooth and creamy.

Stir in the chopped chives if using, and adjust seasoning to taste.

Serve warm as a delicious side dish.