01 - Place potatoes in a large pot and cover with cold water. Add 1 teaspoon salt.
02 - Bring water to a boil over medium-high heat, then reduce to a simmer. Cook until potatoes are very tender, about 15 to 20 minutes.
03 - Drain potatoes thoroughly and return to pot. Let sit uncovered for 2 minutes to evaporate excess moisture.
04 - Mash potatoes using a potato masher or ricer until smooth.
05 - Add butter and stir until fully melted and blended into the potatoes.
06 - Gradually stir in warmed milk and cream until potatoes reach a light and creamy texture. Adjust with more milk as needed.
07 - Season with additional salt and black pepper to preference.
08 - Serve hot, garnished with fresh chives or a pinch of nutmeg if desired.