Choose and prep your potatoes. Use Yukon Gold for a naturally creamy, buttery taste, or Russet for a lighter, fluffier mash. Peel for classic mashed potatoes, or leave some skin on for a rustic texture. Cut into even chunks about 1 1/2 inches so they cook at the same rate.

Start in cold, salted water. Place potatoes in a large pot and cover with cold water by about an inch. Add a generous handful of salt—your water should taste like the sea. Starting cold helps the potatoes cook evenly from edge to center.

Boil gently until tender. Bring to a boil, then reduce to a simmer. Cook 12–18 minutes, depending on potato type and size. They’re done when a knife slides in easily without resistance.

Drain well and dry. Drain in a colander and return potatoes to the hot pot. Set over low heat for 1–2 minutes, stirring occasionally, to steam off extra moisture. Dry potatoes absorb butter and dairy better, making creamier mash.

Warm the butter and dairy. In a small saucepan or microwave-safe cup, gently heat butter with milk/cream until warm and the butter is melted. Warm liquids blend in smoothly and help avoid a gluey texture.

Mash the potatoes. Use a potato masher for a classic texture or a ricer for ultra-smooth mash. Mash until most lumps are gone, but avoid overworking. If you like some texture, stop a bit early.

Stir in butter and dairy. Pour in about two-thirds of the warm butter-dairy mixture and fold gently with a spatula. Add more as needed until the potatoes reach your preferred consistency.

Season and taste. Add salt and pepper. Taste and adjust—potatoes love salt. If desired, fold in sour cream or cream cheese for tangy richness, or roasted garlic for a mellow, savory note.

Finish and serve. Swirl in a little extra butter on top so it melts into the potatoes. Garnish with chives, parsley, or a drizzle of good olive oil. Serve hot.