Sponaneuous Fermentation Beer
Oude geuze (5 - 7 vol.%) is a blend of spontaneously fermented lambic beers of different ages, the oldest being at least 3 years old and the average at least 1 year old, and refermented in the bottle. Only this type of beer can be called “oude geuze”, this being protected as “guaranteed traditional specialty” on a European level. Geuze is usually a more commercial variant, either not consisting of a blend of 1, 2 and 3 year old lambic, or being a blend of spontaneously fermented beer with a top-fermented beer. The adjective “oud” or “oude” may not be used in this case.