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Guide To Resting Coffee - How long Should You Wait?

Jan 28, 2024 ● Jasmin Tétreault

When it comes to brewing the perfect cup of coffee, every step in the process is crucial — from selecting quality beans to perfecting your brewing technique. However, one often overlooked aspect that can dramatically alter the taste of your coffee is the resting period after roasting. While the saying fresh is best may hold true for most produce, when it comes to coffee, a bit of patience can lead to a better cup. This post is about resting coffee, unraveling the science behind it, and exploring why sometimes, rest isn't just best, it's essential.

The Science Behind Resting Coffee

The journey of a coffee bean from a green seed to a flavorful cup involves a series of physical and chemical transformations. Roasting marks the final stage of the coffee bean's transformation. This crucial stage reduces their moisture content while initiating a complex chemical reaction, allowing the beans to store carbon dioxide within their intricate cellular structure.

But the story doesn't end there. The resting period post-roasting is a phase where subtle yet significant changes unfold. As the freshly roasted beans rest, they undergo a degassing process, releasing the trapped CO2. This period is crucial, as it allows the intense flavors and aromas, locked within the beans during roasting, to mature and mellow, leading to a cup that is not just flavorful but also well-rounded and harmonious.

Lighter roasts, with their stronger and less porous cellular structure, require a longer resting period to reach their flavor peak. This period allows for not just physical changes but also slow, intricate chemical transformations that ultimately shape the coffee's final taste profile.

Why Rest Coffee?

The rationale behind resting coffee is to get the best of of it, only when it's adequately rested can the true depth of flavors and aromas come through. For espresso lovers, the importance of resting takes on an added dimension. Freshly roasted coffee, which has about 1% of its weight in carbon dioxide. When used for espresso, can lead to shots with excessive crema and lower extractions.

The release of CO2 gas prevents water from effectively mingling with the coffee grounds, especially in espresso, where it alters the extract's viscosity and the overall extraction process. Within the first one to two days after roasting, the beans are softer and grind differently. Additionally, the presence of methanethiol, a highly volatile and unpleasant-smelling compound, complicates the process further.s. By allowing the beans to rest, the CO2 levels diminish, and getting more balanced and flavorful espresso shot.

The Ideal Resting Period

Determining the perfect resting period for coffee is more art than science, influenced by different factors ranging from the type of coffee to personal taste preferences. We would suggest a starting point, suggesting a resting window of 7 to 14 days for filter coffee and espresso. However, these are mere guidelines, not strict rules.

The ideal resting period varies based on factors like roast level, bean origin, and even the type of roaster used. Lighter roasts generally demand a longer resting period. Some roasters even suggest resting for 1 to 2 months for very light roasts. This is where personal experimentation becomes key.

Resting Coffee and its Impact on Shelf Life

The relationship between resting coffee and its shelf life is nuanced. On one hand, resting is essential for flavor development; on the other, once the bag is opened, the clock starts ticking. Square Mile Coffee's stance is straightforward — once you've rested and opened your bag of coffee, it's best to consume it promptly. Brew and enjoy it till the last bean, they advise. This approach ensures that you experience the coffee at its freshest, relishing the flavors that the resting period has so meticulously nurtured.

Practical Tips for Resting Coffee at Home

The delicate balance between the resting of coffee and its shelf life is crucial. Resting unlocks the full flavor spectrum, but post-resting storage is key to preserving freshness. With low-oxygen containers, coffee maintains its prime qualities for 4-8 weeks. However, the most vibrant flavors and aromas are present in this period, so for the best sensory experience, consume within this timeframe.


The practice of resting coffee is not just about recognizing each bean's journey and complexity; it's about the sheer pleasure of your coffee experience. While the science behind resting can deepen your appreciation, remember that the real joy of coffee culture is in cherishing every cup, whether at its flavor peak or simply as part of your routine. The essence of coffee, after all, is in the happiness each sip brings, transcending the precision of its preparation.


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