The Abt 12 is brewed according to an original recipe from 1946. St.Bernardus Abt 12 Barrel Aged Sour is brewed with that same recipe. After the brew, we let the beer rest in Oak barrels for 3 years. This beer aging lets the beer go sour. In June 2019 we blended it with freshly brewed Abt 12 and bottled it in 75cl bottles. Balanced in flavours, perfect as can be, heavenly nectar within your reach. Enjoy!