Degassing Roasted Coffee: Why, How, and When
Degassing is the process of releasing trapped gases, primarily carbon dioxide (CO₂), from freshly roasted coffee beans. This is a crucial step in achieving optimal flavour and consistency in brewed coffee. 1. Why? • During roasting, coffee beans develop CO₂, which remains trapped inside the bean structure. • If coffee is brewed too soon after roasting, excess CO₂ can disrupt extraction, leading to uneven flavour and excessive bubbling (blooming). • Controlled degassing ensures a balanced extraction, highlighting the coffee’s full flavour potential. 2. How? • Coffee degasses naturally over time. • Whole beans release CO₂ gradually, while ground coffee degasses much faster due to increased surface area. • Coffee bags with one-way valves allow gases to escape while preventing oxygen from entering, preserving freshness. 3. When? • Degassing time depends on roast level and brewing method: Espresso: Typically requires 7–14 days post-roast for stable extraction. Filter/Pour-over: Generally benefits from 3–7 days of degassing for optimal balance. • Dark roasts degas faster due to their more porous structure, while light roasts take longer to release gases. 👉 Do you have any other questions or suggestions regarding degassing to maintain the best freshness and flavour of your roasted coffee?