05 Jun 2105---Jefferson’s Bourbon, a collection of bourbons made in ridiculously small batches, is proud to introduce the newest blend to its portfolio: Jefferson’s Reserve Groth Cask Finish. This blend, debuting in May 2015, features Jefferson’s Reserve bourbon that was aged and fully matured in Kentucky prior to being finished in French oak barrels that once aged wine from Napa Valley’s premier winemaker, Groth Vineyards & Winery.