Mashed potatoes can be made almost completely ahead. Do nearly everything – boil, peel and mash; stir in milk and salt – up to two days ahead. Before serving, reheat. Adding butter at the last minute makes them taste freshly mashed.

Mashed potatoes can be made almost completely ahead. Do nearly everything – boil, peel and mash; stir in milk and salt – up to two days ahead. Before serving, reheat. Adding butter at the last minute makes them taste freshly mashed.