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There was a ‘how it’s done’ program on tv before Christmas. Basically brew coffee (capture odour/steam in a vessel of some sort). Get rid of all the water which leaves a thin sheet of coffee concentrate. Break up the sheet into granules. Put the granules into the jar/can. Something special happens with the foil and can’t remember what. But as you seal the jar put in some of the odour captured earlier so that when the seal is broken by the consumer they get a fresh waft of coffee.
Silly question, is instant coffee dehydrated brewed coffee of some description, and these x% whole bean instant coffees are instant with some fine grinds added?