Pucker Up, Buttercup
Reader Gregory has been out picking persimmons and wants to know what causes the sour, pucker-y taste you get when you bite into one that isn’t quite ripe. Gregory, that’s a really great question. Tannins are responsible for that. They don’t have a taste or an aroma, rather they create a physical sensation known as “astringency”. It happens when phenolic compounds in the tannins combine with proteins in saliva. Little friction-inducing clumps of protein and other debris are created where ordinarily there is smooth lubrication. For the eater, it all adds up to a puckering feeling of dryness in the mouth, which can be downright off-putting.
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