How to Develop Freshly Roasted Coffee Beans - Pour-over Coffee Development Time is Shorter Than Espresso

FrontStreet Coffee: How to Properly Rest Your Pour-Over Coffee Beans

Fresh coffee is always better... right? That statement isn't entirely accurate.

While nobody enjoys drinking stale coffee, brewing beans straight out of the roaster will likely disappoint you. The reason is that the coffee is still in a state of vigorous degassing. Whether you're a roaster or a brewer, understanding degassing is essential. In this article, we'll look at what degassing (bean resting) actually is, how it affects your brewed coffee, and how to do it properly.

Degassing is the process by which coffee beans release gas after roasting. When you roast coffee, large amounts of carbon dioxide and other gases are produced inside the beans.

In the first few days after roasting, a great deal of gas escapes. The problem is that these gases create small bubbles during brewing, and those bubbles interfere with your coffee. They disrupt the contact between the grounds and the water, leading to uneven extraction of flavor and aromatic compounds.

In other words, if you brew freshly roasted coffee, those gases will work against the cup. That's why waiting several days after roasting before brewing is the better approach. This period of carbon dioxide release and chemical change is called degassing.

That said, carbon dioxide inside coffee beans isn't purely a bad thing - it plays an important role in coffee quality. A 2018 study in the Journal of Agricultural and Food Chemistry noted: "Carbon dioxide is an important indicator of coffee freshness, playing a crucial role in shelf life and packaging, affecting the coffee extraction process, influencing crema formation in espresso, and potentially affecting the sensory characteristics of coffee flavor."

Once beans are over-degassed, their flavors become less distinct. The trick is to allow a moderate resting period rather than waiting until the beans have aged into staleness.

But how long you should rest beans after roasting depends on many factors. Typically, pour-over single-origin beans are best brewed anywhere from three days to two or three weeks after roasting. The required resting time varies by coffee: brewing method, processing technique, and roast level all affect how long degassing takes.

About FrontStreet Coffee

In short: FrontStreet Coffee is a coffee research hub dedicated to sharing coffee knowledge with everyone. We share our expertise without reservation to help more friends fall in love with coffee. We also run three coffee discount events every month, because FrontStreet Coffee wants to put the best coffee at the lowest prices into more people's hands - and that has been our mission for the past six years!

FrontStreet Coffee Recommendation

Once your beans have rested, a Hario V60 is the classic vessel for pour-over. Hario, founded in 1921 in Tokyo as a producer of heat-resistant laboratory glassware, redesigned the V60 in 2004 and released it to market the following year, naming it after its signature 60-degree cone angle. That conical shape channels water toward the center, extending contact time so aromas extract fully, while the single large outlet puts flow control - and therefore the final flavor - in the brewer's hands. FrontStreet Coffee favors the resin version, which holds heat well and is produced with the tightest manufacturing tolerances.

For the V60's fast, bright extraction, we recommend light-roast florals and fruit: FrontStreet Yirgacheffe Guji Ding Ding, with its distinct citrus, berry, florals, and green-tea sweetness; FrontStreet Ethiopia Huakui, whose intense tropical fruit notes of strawberry, passion fruit, jackfruit, and lychee make it a juicy favorite; and FrontStreet Kenya Little Tomato, a washed SL28/SL34 lot from Thika grown at 1550-1750 meters and washed with Kenya's characteristic 72-hour double fermentation, delivering bright cherry-tomato and dried-plum acidity with a full juice-like body. If you prefer a darker, mellower cup, FrontStreet PWN Golden Mandheling offers a rich, low-acid profile of herbs and dark chocolate, while FrontStreet Brazil Fazenda Rainha balances nuts, cocoa, and caramel sweetness and works equally well for pour-over, espresso, or moka pot.