Roasting and roasting degree of coffee

The biggest problem with first exposure to professional coffee (specialty coffee) is the name of the degree of baking. For example, city,full city, French, Espresso, etc., all produce different baking colors due to the different roasters used and the areas where they are produced. In addition, some roasting levels are named after mixed coffee; for example, Espresso is a combination of coffee specific roasting levels for the manufacture of Espresso. Even if the color looks the same, coffee may have a completely different flavor. The type of beans selected, the baking heat and baking method, and the baking time are all the main factors that determine the final flavor.

A series of complex chemical changes occur during the baking process. After about 15 minutes of baking, the green coffee loses moisture, turns yellow, and then bursts, just like popcorn. After this process, the beans will 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 decrease and the color of the coffee quickly changes to a dark color. When the preset baking degree is reached, there are two ways to stop baking. Cold air or spraying water after cold air can be used to achieve rapid cooling. Baking is divided into four main categories: light, medium, dark, and verydark. Lightly fried coffee beans (light brown) will have a strong smell, very crisp, high acidity is the main flavor and slightly mellow. The medium-fried coffee beans (light brown) are full-bodied and retain most of the acidity. The acidity of deep-fried coffee beans (with a trace of grease on the dark brown surface) is replaced by a slight bitter taste, resulting in a spicy taste. Extra-deep-fried coffee beans (dark brown or even black with traces of oil on the surface) contain a bitter taste of carbon ash and are significantly less mellow.

In fact, roasted coffee is a kind of food processing. Like cooking or making good wine, the roasting of professional coffee is the chef's personal way of expression.