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I've been confused by this for a while as well. The answer seems to be there's not such thing as a "true" cup of coffee. It pretty much just means whatever the

I've been confused by this for a while as well. The answer seems to be there's not such thing as a "true" cup of coffee. It pretty much just means whatever the respondent considers a cup. (In contrast to studies on alcohol consumption, where researchers have standardized units. And even on surveys will make sure to clarify with respondents so they get responses in normalized units.)

jschwartzi 6y ago
There's an ISO standard for how to brew tea for laboratory comparison: https://en.wikipedia.org/wiki/ISO_3103 https://en.wikipedia.org/wiki/ISO_3103 Also here are all the ISO standards for coffee: https://www.iso.org/committee/47950/x/catalogue/p/1/u/0/w/0/d/0 https://www.iso.org/committee/47950/x/catalogue/p/1/u/0/w/0/... They don't yet have any brewing standards but a lot of what they seem to do is by nose with green or roasted ground coffee.