6 tbsp. (3/4 stick) butter, softened
Place potatoes in a large pot with water to cover. Cover and bring to a boil. Reduce heat to medium-low and simmer until tender when pierced with a sharp knife, about 20 minutes. Run unpeeled potatoes through a food mill or ricer into a medium bowl. Or, holding hot potatoes with a potholder, peel and place in a standing mixer with the paddle attachment and beat until smooth. Or place in a large bowl and beat with a hand mixer.
Add half-and-half and a generous sprinkling of salt. Continue to stir or beat until smooth, light and fluffy, adding more half-and-half if necessary. Cool, cover and refrigerate.
Thirty minutes before serving, microwave potatoes until warm and place in a heatproof bowl set over a pan of simmering water (or simply warm the potatoes in the bowl over the water.) Stir butter into potatoes until melted, and serve. Or, cover with plastic wrap and keep warm over simmering water for up to 30 minutes.
Nutrition information per serving: