I have a porter we make with coffee, cocoa nibs, and lactose which is served on nitrogen (Cellarstream device). Occasionally, the porter will develop a "sour milk" flavor I am assuming from the lactose. We add the lactose to the boil with about 10 minutes left and it doesn't happen all the time. Unfortunately, I have to toss about a half batch because of this unwanted souring.
Has anyone else had this problem? Does anyone have a possible solution? Would like to keep making this beer as it is a good seller but I also don't want to have to toss batches from time to time.
Has anyone else had this problem? Does anyone have a possible solution? Would like to keep making this beer as it is a good seller but I also don't want to have to toss batches from time to time.
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