Nav: Home > Coffee >

What Common Situations Occur During the Coffee Roasting Process?

Published: 2026-01-27 Author: FrontStreet Coffee

Last Updated: 2026/01/27, Professional coffee knowledge exchange. For more coffee bean information, please follow Cafe_Style (WeChat official account: cafe_style). FrontStreet Coffee provides a brief overview of common situations that occur during the roasting process. Coffee roasting involves applying heat to raw coffee beans to remove excess moisture and transform certain components into caramelized sugars and flavor oils. Roasting is what allows coffee beans to develop their

For professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat official account: cafe_style)

Common Issues in Coffee Roasting Process

FrontStreet Coffee provides a brief overview of common situations that occur during the coffee roasting process.

Coffee roasting is the process of applying heat to raw coffee beans to remove excess moisture, transforming certain components within the beans into caramelized sugars and flavorful oils. Roasting is an essential stage for developing flavor in coffee beans—the flavor compounds must undergo roasting to fully express their distinctive characteristics.

Underdeveloped Beans

Underdeveloped beans typically exhibit distinct astringency and grassy flavors, resulting from defective beans or roasting too quickly at too low a temperature. This causes insufficient dehydration of the bean's core, resulting in an underdeveloped roast.

Scorched Beans

Scorched beans invariably result from excessively high surface temperatures. Whether it's applying too much heat initially during roasting or severely burning the bean surface, properly scorched beans emit an asphalt-like aroma when broken open. These beans predominantly show black spots on their surface and have a loose, crumbly structure.

Uneven Roasting

Many factors contribute to uneven coffee roasting, such as inconsistent bean sizes, insufficient dehydration during the early stages, or uneven color development during the crack phase. Additionally, roaster drum design and overloading the roaster can all potentially cause uneven coffee roasting.

Extreme Roasting

Many people excessively pursue certain coffee flavors—whether body, richness, or bitterness—roasting coffee either too light or too dark while blindly searching for their preferences. At this point, roasting should be based on the inherent characteristics of the coffee beans: their hardness, particle size, and other fixed qualities. Rather than blindly pursuing extreme flavor profiles that create a significant imbalance between the coffee's taste and its essential nature.