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Fortified Wine

Fortified Wine

A fortified wine is a wine with grape spirit added, and the single most useful question you can ask about any of them is when the spirit went in. Add it during fermentation, before all the sugar is consumed, and you stop the yeast and keep a sweet wine — that’s Port. Add it after fermentation is complete and you get a dry base to age — that’s the starting point for most Sherry. Timing of fortification, plus whether the wine is aged with air or protected from it, explains the entire category.

  1. When was it fortified? During fermentation (retains sweetness, higher alcohol) or after (dry base).
  2. How was it aged? Oxidatively (exposed to air, going nutty, brown, and long-lived) or protectively (kept fresh and pale). This second axis creates most of the stylistic range.

Sherry is fortified after fermentation to a dry base, then aged through the solera system of fractional blending. The pivotal variable is the veil of flor yeast:

Style Aging Character
Fino / Manzanilla Under flor (biological) Pale, bone-dry, tangy
Amontillado Flor, then oxidative Amber, dry, nutty
Oloroso Oxidative from the start Dark, dry, rich
Pedro Ximénez (PX) From dried grapes Intensely sweet, viscous

Base grape is mostly Palomino; PX and Moscatel make the sweet styles.

Port is fortified during fermentation, leaving natural sweetness, from native Douro grapes such as Touriga Nacional and Touriga Franca. The families:

  • Ruby / Reserve, LBV — aged in bulk briefly, fruity and bottled ready to drink.
  • Tawny — long oxidative barrel aging, nutty and mellow, often with an indicated age (10, 20, 30, 40 years).
  • Vintage Port — a single declared year, aged in bottle, the collectible pinnacle that needs decanting.
  • White and Rosé Port also exist.
  • Madeira (Portugal) is deliberately heated and oxidized (the estufagem or canteiro process), making it nearly indestructible once opened. Styles from dry to sweet track the grapes: Sercial (dry), Verdelho, Bual, Malmsey (sweetest).
  • Marsala (Sicily) is a fortified wine graded by color and aging, from dry to sweet.
  • Vermouth is an aromatized fortified wine (flavored with botanicals) — related, and worth knowing for service and cocktails.

Two axes unlock everything here: fortified before vs. after fermentation ends (sweet vs. dry base), and oxidative vs. protective aging. Plot each wine on that grid and its style follows. Contrast Fino versus Oloroso (same region, opposite aging) and Tawny versus Vintage Port (same region, opposite aging vessel). Because production rules and age designations are periodically revised, verify specifics against official references rather than memory.