01 - Place the potato chunks in a large pot. Add enough cold water to cover and season generously with salt.
02 - Bring to a boil over medium-high heat. Lower the heat and simmer for 15 to 20 minutes, or until potatoes are fork-tender.
03 - Drain the potatoes thoroughly in a colander, then return to the hot pot to let excess moisture evaporate.
04 - Add butter, warmed milk, salt, and pepper to the potatoes. Mash until smooth and creamy, adjusting seasoning to taste.
05 - Serve hot, finished with an extra pat of butter if desired.