Brewdog OverWorks Spontaneity 1

Spontaneity 1 is BrewDog’s first fully spontaneously fermented sour. The beer is first brewed with malted barley and raw wheat. The single-hopped wort was then transferred to the OverWorks sour cellar and left to cool overnight in the 50HL open-topped coolship. This huge metal bath is as historic as brewing gets, allowing the beer to be fermented solely by the wild windborne microflora. The next morning the cooled beer is transferred to oak puncheons and there it remains, untouched and undisturbed, for a year. Twelve months of developing flavour and aroma, pulling elements from the oak to complement the profile already underway. The OverWorks crew then referment the beer with white currants, and bottle without filtration.