The story
If lambic is the raw material, gueuze is the masterpiece. Brewers and specialist blenders — known as geuzestekers — combine lambics of different ages, typically one, two and three years old, and bottle them together. The young lambic still contains sugars that the wild yeast can ferment, so the beer referments in the bottle and builds up carbonation. The result is a lively, sparkling beer often compared to Champagne.
Gueuze became hugely popular in Brussels in the nineteenth and early twentieth centuries, when bottled, fizzy beers were in fashion. Like lambic, it declined in the mid-1900s, but traditional producers kept going. Today, beer labelled “Oude Geuze” (or “Oude Gueuze”) is protected by EU rules as a traditional specialty, meaning it must be made entirely from spontaneously fermented lambic with no sweetening.
What it tastes like
Gueuze pours a hazy to clear gold with a fine white head and plenty of bubbles. The aroma is complex: lemon, grapefruit, green apple, hay, barnyard funk and oak. On the palate it is tart, dry and effervescent, with layered sourness and a whisper of fruitiness. The finish is crisp and refreshing, sometimes with a lingering earthy note. It is intense, but many drinkers find it one of the most rewarding beers on earth.
How it’s made
It begins with lambic — brewed with unmalted wheat and aged hops, cooled in a coolship, and spontaneously fermented in oak barrels. The blender tastes barrels of different ages and chooses a combination that balances acidity, funk and complexity. The blend is bottled with no added sugar, and remaining fermentable material in the young lambic creates natural carbonation. Bottles are then aged for months or years.
Fun fact
Good gueuze can age for decades. Many enthusiasts store bottles on their side, like wine, and some prize vintages that are twenty years old or more. Unlike most beers, a well-made gueuze can become more complex and interesting with time.