Why You Should Care About A Coffee Bean’s Roasting Date

A new bag of coffee beans from the supermarket doesn’t guarantee freshness. One common mistake that most of us make is checking the expiry date and overlooking the roasting date; it’s the one detail that makes the difference between a perfect cup of coffee and one that falls flat. What’s so important about checking the roasting date? Do coffee beans freshly retrieved directly from the roaster have the best aroma and taste? We find out.

What happens during the coffee roasting process?

During the roasting process, carbon dioxide is one of the major gases that form within the bean. This is due to the heat that catalyses chemical reactions, breaking down the complex carbohydrates into smaller molecules which causes browning of the beans. As the roasting continues, carbon dioxide is slowly released during a crucial process known as degassing.

What happens after coffee is roasted?

[caption id="attachment_8428" align="alignnone" width="2560"]a cup of coffee on a white table A coffee bean that has been degassed to perfection will produce a flawless-looking crema layer. Photo from Thom Holmes.[/caption] Shortly after roasting stops, degassing is accelerated and the conversion of sugar happens. But the presence of carbon dioxide in the bean plays a prominent role in the bean’s quality, the coffee extraction, and crema formation. Every roaster’s challenge is to ensur
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