What is a fortified wine (Port, Sherry)?

Fortified wines are arguably the wine world's greatest bargain. Decades-old Tawny Port, complex Amontillado Sherry, rare Madeira from the 1800s — many cost less than a mediocre Napa Cabernet. Here's why you should pay attention.

**Port** comes from Portugal's Douro Valley, one of the most dramatic vineyard landscapes on earth. During fermentation, grape spirit (aguardente at 77% ABV) is added when roughly half the sugar remains. This kills the yeast instantly, locking in sweetness. Ruby Ports age briefly in large vats, staying fruity and vibrant. Tawny Ports age for decades in small barrels, developing caramel, hazelnut, and orange peel complexity through controlled oxidation. A 20-year Tawny is one of wine's great experiences.

**Sherry** is the opposite approach: bone-dry wine that's fortified after fermentation. The magic happens next. If fortified to 15%, a layer of yeast called *flor* grows on the surface, protecting the wine from oxygen and creating the tangy, almond-scented Fino and Manzanilla styles. If fortified to 17%, the flor dies, and the wine ages oxidatively as Oloroso — rich, nutty, and deep. The solera blending system layers vintages together, creating incredible consistency and complexity.

**Banyuls** from southern France is Port's Mediterranean cousin — sweet, Grenache-based, and often aged oxidatively to develop cocoa and coffee notes. And **Madeira** from its namesake Portuguese island is virtually indestructible — heated during ageing (estufagem), it can last for centuries.

The common thread: fortification preserves wine from spoilage, enabling ageing potential that no other wine category can match.