Flying Buffalo Bourbon Barrel Aged Imperial Stout is a Russian imperial Stout by style. This Imperial Stout is transferred to freshly emptied bourbon barrels immediately upon fermentation where it rests for 9 months in our climate controlled Barrel House under the strict supervision of our brewers and cellar people. This craft beer is 12% ABV. In this craft beer review, we will take a look at the color, smell, and taste.