
Creamy, buttery mashed potatoes are one of those side dishes that can genuinely steal the show, and this version delivers that cloud-like texture that makes everyone reach for seconds. Yukon Gold potatoes are the secret weapon here — their naturally waxy, golden flesh breaks down into something silky and rich without turning gluey. Warming the butter and buttermilk together before folding them in is a small step that makes a big difference, keeping the mash loose and velvety rather than stiff or dense. The tang from the buttermilk cuts through all that richness just enough to keep every bite interesting, while white pepper adds a gentle warmth that's a little more subtle than black. For anyone navigating grain sensitivities, this recipe is naturally free of any oat-based thickeners or fillers — every ingredient is straightforward and easy to verify. A scatter of fresh chives on top adds a pop of color and a mild oniony bite that rounds the whole thing out beautifully. This is the kind of recipe you'll come back to every time a roast, a braise, or a holiday table calls for something truly comforting.
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Place the potato chunks in a large pot and cover with cold water by at least 1 inch. Add 1 tbsp kosher salt and bring to a boil over high heat, then reduce to a steady simmer and cook until the potatoes are completely tender and a fork slides through without resistance, 18–22 minutes.
While the potatoes cook, combine the butter and buttermilk in a small saucepan over low heat, stirring occasionally, until the butter is melted and the mixture is warm to the touch but not simmering, about 3–4 minutes. Remove from heat.
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