While I do not usually post this type of thing on my blog, I am sure that it is relevant to many followers. I just bought the Sam Adams Winter Classics mix. Mixes like this give homebrewers inspiration and ideas for homebrews they would like to create or copy. I happen to think that a chocolate beer and a coffee beer are very cool ideas and will at some point give them a shot, homebrew style of course. The issue is that the SA Chocolate Bock does not have a kosher certification on the bottle. The good news is that I followed up with the Star-K who certifies all of the Boston Beer (including Sam Adams), and their reply was: The reason why we do not list it is because it is dairy and they use lactose which is not cholov Yisroel it is cholov stam and we did not want to get involved with Star-D. Therefore, if you are ok with the above reasonings, sip away.