What you need to know about origin, roasting and extraction-the basics of coffee
Origin: Highland coffee is superior.
Among the three major coffee beans, players are after Arabica beans. This is because highland coffee is better than lowland coffee. Therefore, when commenting on the quality of coffee, the height of the origin is often included in the evaluation criteria. The higher the altitude and the lower the relative temperature, the coffee fruit can ripen slowly, so the fully ripe beans have good expansibility and are easy to bake. In the coffee producing countries in Central and South America, the quality of coffee beans is basically evaluated only by the altitude of the place of origin. As for boutique coffee, it is all highland coffee. Of course, if you play more professionally and profoundly, you will probably see whether the coffee has organic certification or not. Players generally agree that: American USBA certification, rainforest certification, fair trade certification.
Roasting: the second Life of Coffee beans
Baking is equivalent to giving coffee beans the finishing touch. The flavor of the coffee bean itself is latent, and only moderate baking can attract its amorous feelings, just as dry wood needs fire. In the eyes of experts, 80% of the factors that determine the taste of coffee come from raw beans and 20% depend on roasting. Baking is divided into deep, moderate and shallow three kinds of baking, these three baking methods themselves are not high or low, or the coffee beans themselves are suitable for what kind of baking method, the key lies in the baking method. If the technique is wrong, even the best beans will be scrapped. The most difficult thing about baking coffee is the best time to stop, which depends on how the roaster captures the characteristics of coffee beans. This should be judged by experience and pay attention to the changes in temperature, color, sound, aroma, shape and luster of beans.
All coffee tastes bitter and sour. Generally speaking, the lighter the degree of roasting, the stronger the sour taste of coffee. The deeper the baking degree, the stronger the bitterness. Deep roasting is suitable for coffee with strong sour taste. Light roasting is suitable for bitter coffee, which can release the sour taste, ease the excessive bitterness and balance the taste. However, coffee has an expiration date, no matter how superb the roasting method is, drink it up within two weeks after roasting, otherwise the flavor will be greatly reduced.
Extraction: the essence of the decisive game.
After the correct picking, production and baking, we came to the last two gates of import, grinding and extraction. The two processes complement each other. The thickness of the grinding determines the way in which coffee is extracted. Generally speaking, fine powder is the easiest to extract the essence, so it takes the shortest time, which is extracted immediately after being washed quickly with water of 90 degrees Celsius, using an Italian machine and a mocha kettle. For moderate grinding, it is usually drunk by the family. Preheat coffee cups and coffee pots to make the coffee more fragrant, usually at a temperature of 85 to 90 degrees Celsius, mainly hand flushing pots, dripping pots and siphon pots. As for the coarse powder, it should be on the French kettle, which takes the longest extraction time, and the water temperature is also between 85 and 90 degrees Celsius.
Source: network
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Coffee beans roasting detailed analysis-a good coffee must-see knowledge
Coffee roasting is a process of pyrolysis, which completely changes the substances inside the green beans, producing new compounds and recombining them to form aroma and alcohol. This effect occurs only at high temperatures, and if only low temperatures are used, decomposition cannot occur. In fact, roasting is the most difficult step in coffee processing.
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Four different coffee brewing methods-flushing out different flavors
Plug-type coffee pot, also known as "siphon", is composed of upper cup, lower cup, cup holder, filter cloth and heater, and uses the physical principle of hot expansion and cold contraction to brew coffee. Because the plug-style coffee pot has a stable and continuous heat source, the brewed coffee is more fragrant and fragrant, and each sip is rich at different sipping temperatures.
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