Cook 1/2 pound chopped bacon until crisp. Make Classic Mash; replace half of the butter with 2 to 4 tablespoons bacon drippings. Fold in some bacon; sprinkle the rest on top.
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