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homemade vinegar

Homemade Beer Vinegar Experiments

Homemade Beer Vinegar Experiments 1This post was almost given the title: “what’s with all the jars with three fingers of stale beer?” But, that isn’t very snappy, now is it? To say nothing of its terrible SEO qualities.

The answer to the question is, as they say, somewhat complicated. One of my favourite recipes in my cookbook, the Canadian Craft Beer Cookbook, is not really a recipe at all. It’s more of a process – three in fact – for turning good beer into excellent vinegar.

I go through the why’s and how’s in some detail in the book, but the short version is something like this: just as there is a microbial action that converts the sugar in wort to the alcohol and carbon dioxide in beer; there is also one that further metabolizes that alcohol into acetic acid. Different microbes and different results, but they are similar. (more…)