The 56th addition Avery Brewing Co.’s Barrel-Aged Series is a blend of beers aged in two different barrels.

That beer is Imperial Stoutwork Orange, a 14.5 percent ABV blend of imperial stouts that have been aged in both bourbon and whiskey barrels and conditioned on cacao nibs, cardamom and orange peel. In an email, Krista St. Charles, communications coordinator at Avery, told Tenemu that the base stout was “split that base beer between whiskey barrels and bourbon barrels, at about a 40/60 ratio in terms of volume (which were) blended back together to make the final product.”

There will be 48 barrels of the beer packaged on Dec. 6, which is roughly equivalent to 660 cases of 12-ounce bottles. The blended stout will be the 56th addition to the Boulder, Colo.-based brewery’s Barrel-Aged Series, which is made up of  “small-batch, highly experimental beers that are only brewed once.”

According to Krista St. Charles, Imperial Stoutwork Orange will be packaged in 12-ounce bottles ($12) that are being released at the brewery on Dec. 13 with no purchase limit. In addition, bottles will be sent to retailers across Avery’s national distribution network after the release.