The secrets of coffee roasting: exploring the types and stages of roasting

Coffee roasting is a profound art, and different types and stages of roasting can bring completely different tastes and flavors. There are many types of roasting, including light roasting, medium roasting and deep roasting, and each roasting method will affect the taste, aroma and color of coffee. The roasting stage is also very important, including dehydration, Menard reaction and carbonization, and each stage will bring a unique taste experience to coffee. Exploring the secrets of coffee roasting is to explore infinite possibilities and wonderful tastes.

In the world of coffee, roasting is a magical process that gives coffee a unique charm and allows its flavor, aroma and taste to be displayed. Coffee roasting seems simple, but it actually contains profound knowledge. Today, let us explore the types and stages of coffee roasting and uncover the mystery of this process.

1. Types of Coffee Roasting

On the market, the common types of coffee roasting are light roast, medium roast and dark roast.

1. Light medium baking :

This roasting method has a relatively low temperature, a short time, and a light overall roasting degree. During the roasting process, the color of the coffee beans gradually changes from the raw bean color to light yellow, and a small amount of oiliness appears on the surface. In terms of taste, light-medium roasted coffee has a distinct sour taste, while retaining the original floral and fruity aroma of the coffee beans, with a refreshing taste and a long aftertaste.

2. Medium roasting :

Medium roasting is a more common roasting method. During the roasting process, the color of the coffee beans changes from dark yellow to light brown, and the surface oiliness gradually increases. The acidity and bitterness of medium roasted coffee are relatively balanced, showing a mellow taste of coffee with some caramelized sweetness.

3. Deep baking :

Deep roasted coffee is roasted at a higher temperature and for a longer time. The color of the coffee beans turns dark brown and the surface is obviously oily. In terms of taste, the acidity of deep roasted coffee is greatly reduced, the bitterness is strong, and it is accompanied by rich caramel and chocolate flavors, and sometimes even has a nutty flavor.

2. Coffee Roasting Stages

The coffee roasting process can be divided into four stages: dehydration stage, induction stage, development stage and end stage.

1. Dehydration stage :

This stage is the initial stage of roasting. The main purpose is to remove the moisture inside the coffee beans. As the temperature rises, the coffee beans begin to change color, the surface gradually becomes dry, and the moisture inside the coffee beans begins to convert into water vapor, releasing the bean aroma.

2. Induction period :

After entering the induction period, the chemical reaction inside the coffee beans begins to accelerate, the temperature further increases, and the color of the coffee beans gradually darkens. At this stage, the flavor of the coffee beans begins to change, and the acidity gradually emerges, laying the foundation for the subsequent taste.

3. Development stage :

This stage is the most critical part of the coffee roasting process. As the temperature continues to rise and the time increases, the substances inside the coffee beans begin to fully react, forming the coffee taste and aroma we are familiar with. At this stage, the roasting temperature and progress can be adjusted according to different roasting requirements.

4. End period :

When the color of the coffee beans reaches the desired depth, it enters the final stage. At this stage, the roasting temperature gradually decreases, the flavor and aroma of the coffee beans gradually stabilize, and the coffee beans have completed the transformation from raw beans to cooked beans, ready for subsequent grinding and brewing.

There are many types and stages of coffee roasting, and each roasting method will affect the final taste and aroma of the coffee. Choosing a roasting method that suits you is like having a unique conversation with coffee, allowing us to savor its beauty and uniqueness. In the days to come, you may wish to try different roasting methods and explore your own coffee flavor journey!