Why does hot coffee that goes cold taste bad, but iced coffee or cold brew taste fine?
In: Other
Ice Coffee is cooled down immediately after brewing so the oils in it have not evaporated away, and other compounds have not oxidized due to exposure to air. It is still fresh and so still tastes good. Standard hot coffee that is allowed to go cold in your cup over the course of an hour or more has had more of the oils evaporate due to being at a high temp longer, and had more of the compounds oxidize due to sitting for an hour or more. The temperature is a very small factor in it starting to taste bad, it effectively going “stale” or the coffee equivalent of going flat over time is the factor.
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