How do I adjust my grinder for pour-over?
To adjust your grinder for pour-over, aim for a medium grind size, which should feel like sea salt or coarse sand. Start by setting your grinder to a middle-of-the-road setting, then brew a test cup. If the coffee tastes sour or thin, adjust to a finer setting; if it tastes bitter or harsh, adjust to a coarser setting.
Grind size is arguably the most important variable in your brewing process because it dictates the surface area of the coffee exposed to water. For pour-over brewing, you are looking for a medium grind. If the particles are too large, the water will pass through too quickly, resulting in under-extraction and a sour, watery cup. If the particles are too fine, the water will struggle to pass through, leading to over-extraction and a bitter, astringent taste.
When adjusting your grinder, it is best to make small, incremental changes. Most modern burr grinders have a numbered dial or a stepless adjustment mechanism. Start by finding the manufacturer's recommended 'medium' setting. Once you have brewed your first cup, evaluate the flavor. If the coffee lacks sweetness and has a sharp, acidic finish, your grind is likely too coarse. Move your setting one or two clicks finer. If the coffee is dry, bitter, or leaves a lingering unpleasantness on your tongue, your grind is likely too fine, and you should move one or two clicks coarser.
Keep in mind that different coffees have different densities. A light-roast, high-altitude bean is much denser than a dark-roast bean and may require a slightly finer grind to extract properly. Conversely, a dark roast is more porous and brittle, meaning it extracts very easily and often requires a coarser grind to prevent bitterness. You should also consider the total brew time; for a standard pour-over, you are generally aiming for a total contact time of 2.5 to 3.5 minutes. If your brew is finishing significantly faster or slower than this, your grind size is likely the primary factor.
In practice, consistency is key. Once you find a setting that produces a balanced, sweet, and clean cup for a specific coffee, write it down. Many home baristas keep a simple log of their beans and the corresponding grind settings. This takes the guesswork out of your morning routine and allows you to focus on the technique of the pour rather than troubleshooting your equipment every single day.