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Coffee processing method: Sumatran method
One of the factors that gives coffee its unique flavor is how it is refined.
In particular, the "Sumatra method" used in Indonesia is attracting attention for its unique process not found in other refining methods .
In this article, we will explain the characteristics of Sumatra coffee, the refining process, and the appeal of its flavor. In addition to the origin and variety, we will also pay attention to the refining method to enjoy coffee on a deeper level.
What is the Sumatra method? Indonesia's unique refining style
The Sumatra method is a refining method mainly used on the Indonesian island of Sumatra. It is also known locally as "Giling Basah," which means "wet shelling" in Indonesian.
This method is a unique refining process that is well suited to Indonesia's hot, humid and rainy climate and is primarily practiced by smallholder farmers.
It is said that this method has developed as an efficient and practical method in environments where drying takes a long time.
Sumatran refining process
The main feature of the Sumatra method is that the beans are dehusked while still moist. The steps for this are explained below.
1. Harvesting and pulping
Fully ripe cherries (coffee fruits) are harvested and the flesh is removed (pulping). Up to this point, the process is the same as that of the water-washed method.
2. Simple fermentation and washing
After removing the pulp, a sticky substance called mucilage remains on the surface of the beans. In the Sumatra method, the beans are left in this state by placing them in a bag or similar container for a short period (half a day to a day) to ferment briefly, and then lightly rinsing them with water.
3. Husk removal in wet conditions (Girin Basa)
At this stage, the beans have a fairly high moisture content of about 40-50%, and while they would normally be dried before being shelled, the Sumatran method involves threshing the beans while they are still wet, a unique process not found in other refining methods.
4. Drying process
The shelled green beans (raw beans) are spread out on the ground or on African beds to dry in the sun. As the drying process is greatly affected by the weather, the appearance and flavor tend to be unique to each farmer.
The distinctive flavor created by the Sumatran method
Coffee processed using the Sumatra method has a unique flavor that cannot be found in other methods. The main characteristics are as follows:
・
Heavy and solid body ・
Complex aromas of spices and herbs ・
Earthy flavor reminiscent of soil and wood ・
The acidity is mild and the bitterness is the main flavor
This flavor is enhanced by dark roasting . It also pairs well with milk, making it suitable for cafe au lait, cafe latte, and iced coffee.
Why does the Sumatran style have such a unique taste?
The key to the Sumatran flavor is the process of "removing the shells while they are still moist."
In conventional processing methods, the beans are dehusked after drying to stabilize the flavor, but in the Sumatra method, the beans are dehusked before this, which causes subtle changes in the bean structure, resulting in a unique and complex flavor.
In addition, the soil and climate of Indonesia also have an influence, so even if it is the same Sumatran style, you can enjoy different characteristics depending on the place of origin and farm .
Who is this recommended for?
Sumatran-style coffee is perfect for those who don't like coffee with a strong acidity, or for those who value richness and depth of flavor .
This is especially recommended for those looking for a coffee with a deep aroma and a strong mouthfeel.
In addition to drinking it black, it also pairs well with milk, so you can enjoy it in a variety of ways.
summary
The Sumatran method is a unique processing method born from the Indonesian climate and the wisdom of small farmers. The unique process of removing the shells in a wet state gives it a deep, rich flavor and unique taste .
If you want to try a coffee that is a little different from other processing methods, try coffee made using the Sumatran method. It will surely make your daily coffee experience richer and more flavorful.
