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I am decidedly in the FREEZE? YES! camp.
After many years of testing and field use of freezing coffees between myself and some other coffee professionals I know, I have found very little degradation of frozen coffees in their roasted whole bean form. Collectively between us, I think we have a total of 15 years freezing experience.
It's very easy to think that freezing water in the bean will crystalize to the point in will damage the structure. We have not found this to be true because roasted coffee simply does not have enough water content (2-3%) to damage the bean. Compare this to freezing string beans or a tomato and you'll easily see what freezing damage will do to a product.
What freezing accomplishes for the operator is a suspension of aging. If you freeze your coffee on Day 4 out of the roaster, you start from Day 4 when you thaw the coffee. This means you can store roasted coffee almost indefinitely at nearly any point of its aging cycle, hold it and then serve from that moment forward.
Some people have stated that the thawing of the coffee "speeds up" the aging process. However, I have not found that to be true - partly because our coffees don't last more than a few days and for us to see any truly notable change would require holding the coffee longer than our production needs demand.
The problem with decaf is the extreme damage the process does to the structure of the bean that increases its rate of staling, combined with the relatively low demand means that you'll invariably find yourself with stale decaf while still having a stock of it on hand. Freezing allows you to manage and maximize your product without sacrificing the quality of the coffee.
As for us, we don't offer decaf :) We better focus on our core competency—serving various fresh and amazing Single Origin coffees as double ristretto—and not stretching ourselves thin with adding so-so decaf.
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