Introduction to the knowledge and stage of Coffee roasting

A series of chemical changes occur during the baking process. After about 5-25 minutes of baking (depending on the temperature selected), the green coffee beans lose some humidity and turn yellow. In this process, the coffee beans will swell, changing from a strong, high-density raw bean to a low-density fluffy state. After this process, the coffee beans will about double in size and begin to show a light brown after stir-frying. After this stage is completed (after about 8 minutes of baking), the calories will be reduced. The color of the coffee soon changed to dark. When the preset baking depth is reached, cold air can be used to cool the coffee beans in order to stop the baking process.

Baking is roughly divided into shallow baking (Light), medium baking (Medium), urban baking (City) and deep baking (Deep). Light roasted coffee beans: will have a strong smell, very crisp, high acidity is the main flavor and slightly mellow. Medium-roasted coffee beans: have a strong mellow, but also retain a certain degree of acidity. City-baked coffee beans: the surface is dark brown, the acidity is replaced by slight bitterness, and most of the flavor has been destroyed. Deep-roasted coffee beans: dark brown in color and oily on the surface. For most coffee beans, the alcohol content increases significantly and the acidity decreases. In fact, roasting coffee is a way of processing food. The roasting of professional coffee is the personal expression of the roaster. Just started to contact with professional coffee.

Coffee beans with different roasting degrees

Coffee beans with different roasting degrees

(SPCIAITYCOFFEE) the biggest problem is the name of the degree of baking. For example, CITY, FULLCITY, FRENCH, ESPRESSO, etc., all produce different baking colors because of the different baking machines and producing areas. In addition, some roasting levels are named after mixed coffee: for example, ESPRESSO is a coffee with a specific roasting degree for making ESPRESSO, and even if the color looks the same, it may have a completely different flavor. Therefore, the selection of the type of beans, baking temperature and baking method, and the length of baking time are all the main factors that determine the final flavor. The roasting method of professional coffee is usually divided into the following eight stages.

1. Very shallow baking (LIGHTRoast):

The degree of baking; very shallow baking, also known as shallow baking.

The lightest roasting degree of all roasting stages, the surface of the coffee beans is a light cinnamon color, its taste and aroma are insufficient, this state is almost undrinkable. It is generally used for testing and seldom for tasting.

2. Shallow baking (CINNAMONRoast):

Degree of baking; shallow baking, also known as cinnamon baking.

The general baking degree, showing cinnamon color on the appearance, the smell of green has been removed, the aroma is OK, and the acidity is strong, which is a common roasting degree of American coffee.

3. Micro baking (MEDIUMRoast):

Baking degree; moderate baking, also known as micro baking.

Medium baking heat and light baking are both American, in addition to sour taste, bitterness also appears, the taste is good. It has moderate aroma, acidity and mellowness, and is often used in the baking of mixed coffee.

4. Medium baking (HIGHRoast):

Baking degree; moderate micro-deep baking, also known as concentration baking.

Belongs to the moderate micro-deep baking, the baking degree is slightly stronger than the slight medium baking, the surface has appeared a little thick brown, the bitterness also becomes stronger. Coffee tastes sour and bitter, with good aroma and flavor, and is most often loved by people in Japan and Central Europe. (blue Mountain Coffee)

5. Medium and deep baking (CITYRoast):