What is a parchment coffee?

To understand parchment coffee, one must look at the anatomy of the coffee cherry. The cherry is composed of several layers: the outer skin (exocarp), the fruit flesh (mesocarp), the sticky mucilage, the parchment (endocarp), and finally, the seed or bean itself. During the processing phase, the goal is to remove the outer layers while keeping the bean intact and protected.

When coffee is processed using the washed method, the skin and pulp are removed by a machine, leaving the bean covered in mucilage and the parchment layer. The coffee is then fermented and dried while still inside this parchment shell. The parchment acts as a vital barrier, shielding the delicate green bean from environmental factors like humidity and light during the drying process. It is essentially the bean's "armor" until it is ready for the final milling stage.

Once the coffee has reached the desired moisture content—typically around 11%—it is stored as parchment coffee. This is a stable state for the bean, allowing it to be held in warehouses without degrading quickly. When the coffee is ready to be sold or exported, it is sent to a dry mill. Here, the parchment layer is mechanically removed in a process called hulling, revealing the clean green coffee bean that is ready to be roasted.

For the reader, the term "parchment" is a reminder of the complex journey coffee takes before it reaches the roaster. It is a critical component of the supply chain, ensuring that the quality developed on the farm is preserved through the drying and storage phases. In practice, the presence of parchment is a sign that the coffee has been processed with care, as it is the final protective layer before the bean is exposed to the world.