没那么夸张，15分钟，不过我感觉不应该超过2分钟。
有名的咖啡经验规则， 15-15-15
生豆15个月，
熟豆15天，
磨成粉15分钟，
特别讲究的可以上面三条都打对折。

“Personally, I subscribe to Babbie's Rule of Fifteens, which you'll freqeuntly
find touted as a rule-of-thumb on coffee enthusiast forums. The Rule goes
like this:

Green coffee lasts about 15 months before it goes stale.

Roasted coffee lasts about 15 days before it goes stale.

Ground coffee lasts about 15 minutes before it goes stale.”

【 在 richiter 的大作中提到: 】
: 磨好还醒啊，都硬了。。。
: 我记得哪个大佬说粉保持风味的时间是30秒还是40秒来着。
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修改:FLYBBS FROM 175.160.201.177
FROM 175.160.201.177