
Tawny port is a fortified wine from Portugal’s Douro Valley, aged for years in wood barrels until it oxidizes to an amber-brown color.
Madeira
A medium-sweet Bual or sweet Malmsey is closest in taste and goes in at the same amount, with similar nutty, caramel notes.
Takes the same amount. The drink turns redder and fruitier and loses the nutty note.
Cream sherry
Also goes one for one and is a little sweeter.
Keeps well after opening thanks to its oxidative aging; lasts several weeks with a stopper, far longer than an unfortified table wine.
Tawny port