Highland Cask has been matured in oak barrels previously used for 18-year old single malt whisky from the highlands of Scotland.
The new 33cl bottle carries an abv of 7.1% and is priced at £2.50/US$3.85.
It joins Innis & Gunn’s core range of Original, Blonde and Rum Cask oak-aged beers.
Dougal Sharp, Innis & Gunn managing director, said: “Earlier this year we were lucky enough to obtain some extremely rare oak barrels from a renowned distillery in the Highlands of Scotland.
“Once they had been emptied, we filled them with beer brewed to perfectly complement their rich, complex flavours.
“During a lengthy maturation, our beer slowly unlocked these delicious flavours from deep inside the oak to produce this delicious beer.”