Oude Geuze Boon is a monument of taste with an alcohol content of 7%. It’s a magnificent blend of 90% mild 18-month old lambic, 5% strong 3-year-old beer and 5% very young lambic, Which Provides firm table sugars and wild yeasts. All our beers are aged in oak casks, mixed in a vessel or 25,000 liters and chilled. Before bottling, we bring the mix to fermentation temperature. The bottles are then placed in an air-conditioned room, Which leads to a secondary fermentation in the bottle. Want to know the bottling date? Simply subtract 20 years from the “best before” date!