The secret of coffee roasting, explore the five stages, coffee roasting is divided into 5 stages

This article explores the mysteries of coffee roasting and introduces the five stages of roasting. Each stage is presented in pictures, showing how the coffee beans change during the roasting process. From green beans to light-medium roasting, to deep roasting, each stage has its own unique flavor and characteristics. The control of temperature and time during the roasting process is crucial to the taste and quality of the coffee. By understanding these stages in depth, you can better master the coffee roasting skills and enjoy delicious coffee.

Coffee roasting is an art as well as a science. During this process, coffee beans go from raw to mature, undergoing a series of subtle chemical and physical changes, bringing us different flavors and experiences. This article will explore in detail the five stages of coffee roasting - the yellow ripe stage, the dehydration stage, the browning stage, the development stage and the full roasting stage. By in-depth analysis of the characteristics and changes of each stage, the mystery behind coffee roasting is revealed.

1. Yellow ripe stage

In the early stages of roasting, the coffee beans have a raw yellow appearance. At this stage, the moisture inside the coffee beans begins to evaporate gradually, the surface begins to become dry, the aroma of the coffee beans has not yet been fully released, and the taste is relatively bland. The roaster needs to master the time and temperature to ensure a perfect transition to the next stage.

2. Dehydration stage

As the temperature rises, the coffee beans enter the dehydration stage. At this stage, a large amount of water inside the coffee beans evaporates, the volume shrinks, the color gradually darkens, the aroma of the coffee beans begins to gradually emerge, and a unique caramel flavor begins to permeate. Control of the dehydration stage is crucial to the final taste and aroma of the coffee.

3. Browning stage

After entering the browning stage, the color of the coffee beans further deepens, showing a distinct brown color. The chemical reaction inside the coffee beans becomes more intense, and the aromatic substances begin to be fully released. This stage is a critical period in coffee roasting and has a decisive influence on the final flavor of the coffee.

IV. Development Stage

As the roasting progresses, the coffee beans enter the development stage. At this stage, the color of the coffee beans deepens further, an oily sheen appears on the surface, and the aroma becomes more intense. At this stage, the flavor and taste of the coffee begin to show unique characteristics. Different flavors such as sour, sweet, and bitter begin to develop in a balanced manner, and the texture of the coffee beans also becomes harder, laying the foundation for subsequent brewing and extraction.

5. Complete Baking Stage

The final stage is the pinnacle of the entire roasting process. During this period, the color of the coffee beans has become very dark, almost black, and the aroma of the coffee beans has reached its peak, releasing a rich coffee aroma. The surface of the coffee beans has been completely covered with oil, which looks very tempting. This stage is also extremely critical. Over-roasting will make the coffee bitter and lose its original flavor and aroma. The roaster needs to rely on rich experience and skills to end the roasting process just right.

The slight changes in each stage will have a huge impact on the final taste of the coffee. Different roasting stages represent different flavors and taste characteristics, from refreshing sourness to strong bitterness, which are the charm of coffee roasting. Every roasting step requires the roaster to feel and control it carefully to ensure that a perfect cup of coffee is presented in the end.

Each of these five stages has its own unique characteristics and significance. Together, they constitute the complete process of coffee roasting, bringing us a rich and diverse coffee experience. In this process, we can not only taste the deliciousness of coffee, but also feel the roaster’s love and pursuit of this art.