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How Long is the Coffee Bean Degassing Period? A Complete Guide to Single-Origin Bean Degassing

Published: 2026-01-27 Author: FrontStreet Coffee

Last Updated: 2026/01/27, Professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat public account: cafe_style). FrontStreet Coffee - A Brief Introduction to Coffee Bean Degassing. Many friends who are new to freshly roasted coffee beans are often confused about conflicting advice about when to drink their coffee. They wonder why sellers sometimes tell them to consume within two months, while other times they're advised to wait 4-5 days. Keeping track of so many dates can feel like studying history.

FrontStreet Coffee - An Introduction to Coffee Bean Resting

Many friends who are new to freshly roasted coffee beans often find themselves confused. Why do sellers sometimes tell you to finish the beans within two months, while other times they suggest waiting 4-5 days before drinking? Keeping track of so many dates can feel like studying history.

One of the main purposes of resting beans is to allow them to degas: freshly roasted coffee beans still contain gases produced during roasting, such as carbon dioxide. If you drink them immediately, you'll notice some smoky flavors. Only when the smoke and miscellaneous flavors dissipate will the good flavors gradually emerge.

Additionally, even after cooling, chemical reactions continue slowly within the roasted beans, developing subtle flavor changes.

The length of the resting period is primarily determined by the roast level - the lighter the roast, the shorter the resting period needed, sometimes just one day. Conversely, the darker the roast, the longer the resting period required.

Essentially, no roaster will precisely tell you the exact resting period for a specific bean. This is because it's extremely difficult - each bean variety requires a different optimal resting period due to slight variations in factors such as variety, moisture content, and roast level.

Moreover, each consumer has different taste preferences and brewing methods. You might find that the coffee tastes best on the fifth day, while someone else prefers to brew and drink it on the second day.

Coffee beans used for espresso are somewhat special. On one hand, espresso machines primarily rely on pressure extraction, and residual gases in the beans can affect extraction efficiency. On the other hand, because it's concentrated, flavor differences are amplified. Therefore, beans generally need to "rest" until gases are completely expelled, which takes one to two weeks.

Key takeaway: Overall, bean resting is mainly aimed at espresso extraction and doesn't have strict requirements for pour-over coffee - 3-4 days is sufficient.

In short: FrontStreet Coffee is a coffee research establishment dedicated to sharing coffee knowledge with everyone. We share without reservation simply to help more friends fall in love with coffee. Additionally, we hold three discounted coffee events each month because FrontStreet Coffee wants to let more people enjoy the best coffee at the lowest possible price - this has been our mission for six years!