Coffee Resting & DegassingUpdated 5 hours ago
Resting, or degassing, coffee after roasting is often the most overlooked step in extracting the most balanced profile of any specialty coffee. Roasting coffee is a controlled series of chemical and physical transformations that build flavor, aromatics, and structure. Roaster temperatures and steam will begin to cause internal temperatures inside the coffee seed to rise, causing it to expand and physically crack. As the coffee seed becomes less dense, the structure of its cell walls becomes porous - this is key for brewing. Post-first crack, sugars begin to caramelize, acidity softens, and aromatic compounds develop quickly. What may be less familiar, though, is how much CO₂ (carbon dioxide) builds up inside the coffee seed.
Because of this release of CO₂ from the coffee seed, attempting to brew too soon off-roast can disrupt extraction, cause channeling, excessive crema in espresso, or create a muted flavor profile. “Resting” your coffee can ensure you are brewing during its optimal window, catching those beautifully balanced, expressive, and aromatic flavor profiles created from roasting. Brew too early and you will likely experience a sharp, hollow, or flat profile. Brew too late, and those flavor notes will slowly begin to disappear.
The “sweet spot” for many specialty coffees can peak between 5-12 days off of roasting, but this will also be dependent on origin, processing method, and roasting style. As this coffee degasses and ages, you will experience noticeable changes in acidity, sweetness, and body. As a general rule-of-thumb, we recommend resting your coffee a minimum of 5-7 days for Filter brewing methods (pour over, automatic drip, etc.) and 7-10 days when brewing for Espresso.
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