​Umami is described as the fifth flavour, along with sweet, sour, salty and bitter. It is a savoury flavour that can be found in foods such as tomatoes, mushrooms, soy sauce, and aged cheeses, and is attributed to the presence of glutamate in these foods. Glutamate is a neurotransmitter, responsible for sending messages between neurons and the brain. All foods, including coffee, contain some amount of glutamate. Tomatoes, cheese and mushrooms contain high amounts of glutamate. However, in coffee, it is unlikely that this flavour is derived from free glutamates, as there are very few free glutamates present in green coffee. Therefore, it is more likely that the umami flavour that we sometimes find in certain lots is attributed to other compounds and substances present in coffee.

​Giling Basah in the local language, Bahasa Indonesian, means wet hulled. It refers to the local way of processing coffee, and more specifically to the moment when the parchment is removed from the green coffee. As we know, coffee processing aims to clean the green coffee from all the protective layers, mucilage, pulp and fruit that protect it. This wet hulling process is very particular, because it removes the parchment from the green coffee when it is still wet, i.e., at 45-50 % humidity. This would be seen as an aberration anywhere else in the world.

​Sumatra is the largest island in Indonesia. It is an exotic and mysterious island, with a history that not many know about, making it perhaps an obscure place, but the reality is that Sumatra is a majestic island, with abundant nature and friendly people, like few others in the world. And while most of its coffee production is concentrated in the far south of the island and is exclusively Robusta coffee (perhaps hence its bad coffee reputation), the north of the island produces only arabica coffee and in recent years the focus on quality has been growing. In the world of speciality coffee its reputation has been changing for the better, and in some regions like Gayo, we happily see more and better coffees year after year.

​The Dutch governor of Malabar (India) sent Arabica coffee seeds from Yemen to the Dutch governor of Batavia (present-day Jakarta) in 1696. The first seeds failed due to flooding. The second shipment of seeds was sent in 1699. The plants grew, and in 1711 the Dutch East India Company -VOC- sent the first exports from Java to Europe, reaching 1,000 kg shipped in 1717.

​But how has this happened? How can such an underestimated and undervalued origin by the world of specialty coffee, can become a new quality trend in many countries, and a No. 1 favourite for many coffee enthusiasts around the world in such a short time?