Make Classic Mash or Chunky Red Mash. Use 1 cup sour cream instead of milk; top with fresh dill.
Cover 2 pounds whole russet or Yukon gold potatoes with cold salted water; simmer 45 minutes. Drain, peel and mash with 1/2 to 1 stick butter. Add 1 cup hot milk, and salt and pepper; mash until smooth and fluffy.
Chunky Red Mash
Cover 2 pounds whole red potatoes with cold salted water; simmer 40 minutes. Drain; do not peel. Smash with 1/2 to 1 stick butter, 3/4 cup hot milk, and salt and pepper.
Photograph by Kana Okada