01 - Place potatoes in a large pot and cover with cold water. Add a generous pinch of salt.
02 - Bring to a boil over medium-high heat. Reduce to a simmer and cook for 15–20 minutes until potatoes are fork-tender.
03 - Drain potatoes thoroughly in a colander. Return to the hot pot to evaporate excess moisture.
04 - Add butter, warmed milk, salt, and black pepper to the potatoes. Mash until smooth and creamy, adjusting seasoning as needed.
05 - Serve hot, garnished with a pat of butter if desired.