01 - Place potato chunks in a large pot and cover with cold water. Add 1 teaspoon salt.
02 - Bring to a boil over high heat, then reduce to a simmer. Cook until potatoes are tender, about 15 to 18 minutes.
03 - Drain potatoes thoroughly and return to the hot pot. Allow them to steam dry for 1 to 2 minutes.
04 - Use a potato masher or ricer to mash the potatoes until smooth and free of lumps.
05 - Gradually blend in the warm milk, heavy cream, and butter until fully combined and creamy.
06 - Adjust seasoning with additional salt and freshly ground black pepper as desired.
07 - Transfer to a serving bowl and garnish with chopped chives or parsley, if preferred. Serve hot.