In this crucial episode, we dive into the universe of coffee right after its roasting.
Discover the crucial role of the master roaster, who not only selects the bean but also adjusts the roast to extract its full potential and conducts thorough quality control.
However, the real challenge begins once roasted: preservation! We explore why storing coffee properly is almost as important as roasting it.
You will learn about:
• The number one invisible enemy: oxygen. Oxidation "steals key pieces" from coffee molecules, directly affecting the volatile organic compounds (responsible for complex aromas and flavors, like floral and fruity notes) and the lipids (which, when oxidized, cause a rancid taste and smell).
• The importance of grinding coffee just before brewing. Grinding increases the surface area exposed to air drastically, opening the door to oxygen. That's why storing it whole bean is the first line of defense.
• The need for a resting period or degasification (between 5 and 15 days) after roasting. During roasting, the bean accumulates carbon dioxide (CO2) that needs to be gradually released. If coffee is used right after roasting, the CO2 interferes with water extraction, resulting in uneven, acidic, or watery coffee.
• Solutions to protect your coffee:
◦ Storing it whole bean, away from oxygen, light, and heat.
◦ The ingenious design of one-way valves in coffee bags, which allow CO2 to escape without letting oxygen in. Additionally, the accumulated CO2 creates a protective atmosphere inside the package that slows down oxidation.
◦ Industrial techniques like vacuum packaging or injecting inert gases (nitrogen or CO2) to sweep away oxygen.
The conclusion is clear: roasting is an art, but properly preserving coffee is pure science to ensure you enjoy a spectacular cup.
Paying attention to the roast date and packaging type when buying, and grinding just before brewing, are the most powerful gestures you can make at home to respect all the work from the farm to your cup.
