Fine Coffee Science explains the roasting of coffee beans in detail

When high-quality coffee beans are picked, the most important step in making them gourmet coffee is roasting and mixing.

Professional coffee is generally roasted in small batches. The most common baking methods are drum baking and hot air baking.

The drum roaster puts the coffee beans in a rotating vat and burns gas or wood to bake them.

A hot air roaster, also known as a fluidization air roaster, roasts coffee beans by rolling them in hot air.

The color of lightly roasted coffee beans is between cinnamon and light chocolate. Because of its sour taste, it is generally not used to make espresso.

Deep baking, comparatively speaking, has a more bitter and sweet flavor. The aroma extracted from coffee beans is proportional to the baking time.

The deeper the baking, the less caffeine and acidity. The color of deep-roasted coffee beans ranges from satin chocolate to oily brown and black. The deeper the baking, the more scorched you taste, and the lighter the flavor of the coffee bean itself.

Especially deep-roasted coffee beans will have a smoky taste, which is more suitable for ordinary coffee than Italian espresso.

On the west coast of the United States, "French style" is often used to describe the deepest baking. You know, this term has nothing to do with the origin of coffee or the place where it is roasted.

There are more than 100 coffee producing areas in the world, and the coffee beans produced have their own characteristics. The mixing of coffee beans is to balance the flavor of coffee in order to create an unparalleled delicacy.

A single coffee bean generally lacks the complex flavor necessary to make a delicious cup of coffee. Many blends contain three to seven different types of beans.

In the United States, 100% Arabica coffee beans are used to mix the best blends. As mentioned earlier in the article, in Italy, some Robster beans are added to mixed coffee to increase the complexity of its fat, caffeine and coffee flavor. Italy has generations of experts who mix coffee beans.

Baking or mixing first has always been a controversial issue among bakers. Generally speaking, each product is roasted first and then mixed, which will maximize the different flavor characteristics of each kind of coffee and produce the best effect. The classic Blaser coffee beans launched by the Swiss coffee maker use this way to bring you the most delicious coffee.

Freshly roasted coffee beans release hundreds of chemicals. It takes a day or two to dissipate in order to achieve the best flavor.

Now, many high-quality roasters, such as Blaser, pack coffee beans in sealed bags with one-way valves to release the gas and prevent coffee beans from being stored in destructive gases. This kind of packing helps to maintain the good flavor of coffee beans.

If the coffee beans are not packaged in this way, when the packaging is opened, the coffee beans will begin to deteriorate. The oil on the surface of coffee beans can also go bad easily.

After the packaging of the coffee beans is opened, if preserved properly, the coffee beans will remain absolutely fresh for 10 days. We recommend that coffee beans should be kept in clean, dry, sealed containers and in a place away from light.