What is "fortified wine"?

Fortified wine is a type of wine that has been strengthened by the addition of a distilled spirit, usually brandy. The process of fortification stops the fermentation process, leaving residual sugar in the wine and increasing its alcohol content. Fortified wines can be made from a variety of grape varieties and are produced in different regions around the world, including Portugal, Spain, and Australia. Some of the most popular types of fortified wines include Port, Sherry, Madeira, and Vermouth. Fortified wines come in a range of styles, from dry and nutty to sweet and syrupy, and can be enjoyed on their own or used as a base for cocktails, such as the classic Martini or Manhattan. Fortified wines can also be used in cooking, particularly in savory dishes such as stews and sauces.