PSA: I just read that coffee beans can lose about 60% of their aroma within 15 minutes of grinding

Emma Shah · 2026-04-04T07:25:03.684336+00:00

Found that stat in an old roaster's guidebook I picked up at a flea market in Seattle. Does anyone else have a specific time window they try to brew within after grinding?

the_oliver6mo ago

My record is brewing yesterday's forgotten grounds, so you're doing fine.

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milacarr6mo ago

Wow, 15 minutes? My morning routine is basically me grinding beans, then getting distracted by my cat for a half hour. So I'm probably brewing with sad, aroma-free dust. What's the longest you've let grounds sit before realizing your mistake?

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robert_hayes4mo ago

Read somewhere that the aroma loss slows down after the first 15 minutes, so you're not doomed if you forget for a bit. I've definitely left grounds sitting for like 20 minutes and the coffee still tasted fine to me.

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