Cerveza Sin Frontera is a collaboration between Trois Dames, Crooked Stave, and Jester King. This sour/wild ale is normally aged in Sherry barrels and is 5.9% ABV, but this special version is aged in Cognac barrels instead of Sherry barrels and is 7.8% ABV.
The story of this beer follows:
The brewers of Trois Dames, Crooked Stave, and Jester King began a joint project in 2013, the idea being to brew a beer based on an identical recipe but brewed in three different places. The first batch was brewed at Jester King in Austin, Texas, the second one at Crooked Stave in Denver, Colorado, and finally the third one at the Brasserie Trois Dames in Switzerland in May 2014. Each brewery was provided with Fino Sherry barrels from Jerez de la Frontera which were practically 70 to 80 years old in which the beer ages for 6 to 12 months. At the Brasserie Trois Dames, a seasonal-type yeast strain was used for the main fermentation and active lactobacillis yeast was added for barrel fermentation. This yeast comes from the Fromagerie Tyrode in L’Auberson. And finally a Lambic beer base from Oud Beersel was also added.