Pulse 1/4 cup pitted kalamata olives, 1/2 stick soft butter and 2 tablespoons each parsley and cilantro in a food processor. Dollop the olive butter on Classic Mash.
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.
Photograph by Kana Okada