What is fortified wine?

You maj not have come across the term ‘ fortified wine ’ before, but you’ve almost certainly drunk one. Ever had a glass of port or sherry at Christmas? Then you’ve tried a fortified wine. And if you’ve ever tried Madeira , marsala or Pineau des Charentes , then you’re part of the fortified club, too.

The name refers to the fact that fortified wines have spirit or brandy added to them, locking in any sweetness, upping the alcohol and giving them a longer shelf life. But don’t be misled – with the exception of Madeira, which lasts months even...