Pulling a good shot of espresso relies heavily on the quality of coffee beans, particularly their oiliness. Darker roasts are typically shiny due to natural oils, which enhance flavor but oily appearances in lighter roasts indicate storage problems. Oily beans can cause grind inconsistencies and clog espresso machines, leading to bitter coffee if not cleaned properly. If faced with oily beans, users must clean their equipment frequently to prevent rancid oil buildup from affecting future brews, ensuring better espresso quality.
Darker roasts typically exhibit an oily sheen due to the roasting process, enhancing their deep, smoky flavors. However, an oily appearance in lighter roasts signals improper storage.
Using oily beans can lead to equipment issues, such as clogging in grinders and espresso machines, resulting in inconsistent grounds and bitter flavors.
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