Boon jonge lambiek is single barrel lambic a lambiek that generally has been aged for less than 1 year and is served at the brewery, at festivals, and at bars around Belgiumand elsewhere. The exact time when a beer switches from jeune oude to vieux jonge is based on the fermentation progress and is at the brewer's discretion. Jonge lambic still and maintains many of the fresh sugars that enable an active fermentation and . It is primarily used in blends with 2 and 3 year old Oude lambic oude lambiek to create a gueuze geuze blend.
Boon generally does not provide jonge lambiek directly to consumers or blenders.