3poundsYukon Gold potatoespeeled or washed, cut into 2-inch pieces
1teaspoonkosher saltplus more for boiling potatoes
⅔cupmilkheated
2tablespoonsbutter or olive oilheated with the milk
½cupplain nonfat Greek yogurt
Chopped parsley for garnish if desired
Instructions
Place potatoes in a large pot, cover with cold water by 2 inches and add a teaspoon or so of kosher salt to the water. Bring to a boil, then reduce to a simmer. Simmer until fork-tender but not falling apart, about 30 minutes; drain.
Transfer potatoes to a large mixing bowl or mixer with the whisk attachment. Beat on medium speed until finely crumbled. Add milk, butter, salt, and Greek yogurt. Beat until very smooth. Add more milk if needed to create a light, creamy texture. Serve hot, garnished with parsley if desired.