This extra air takes away the freshness of the remaining coffee beans, making them more stale for your next cup. Look for airtight coffee bags instead, that typically come with a one-way valve or seal at the top. Such packaging allows the roasted beans inside to degas, while also restricti...
Coffee needs todegasafter roasting, and due to the high levels of pressure used in brewing an espresso, you need to wait for the coffee to degas before you brew it at home. Most suggest at least a week, Lyndon suggests even “at least 10 days after roasting date” and sometimes more....