This is a Unibroue product, and like everything they do, it's on lees. I should not have bought this: it sounded appealing, but I've never in my life (we're talking going back 25 years) liked the taste of a Unibroue beer. And this was no exception. The on-lees dead-yeast taste was so strong it went down the sink after two small sips: I did try to detect the taste of whisky, but no, it was not to be.