How do I make a pour over with an unbleached filter?

Unbleached filters are a popular choice for home brewers looking to reduce their environmental footprint, but they require a specific preparation step to ensure they don't compromise your coffee's flavor. The natural fibers in unbleached paper often contain compounds that can impart a woody or papery taste to the final cup. A thorough rinse with hot water is the most effective way to mitigate this, while simultaneously pre-heating your brewing device.

Beyond the flavor profile, unbleached filters can sometimes behave differently than their bleached counterparts due to differences in paper density and manufacturing. Some unbleached papers are slightly thicker, which can slow down the flow rate. If you find that your brew is taking significantly longer than your usual recipe, or if the coffee tastes over-extracted, try adjusting your grind size to be slightly coarser. This simple change can help balance the extraction and keep your brew time within the ideal 2:30 to 3:30 minute window.

When brewing, treat the unbleached filter as you would any other high-quality paper. Ensure it is seated snugly in your dripper. If you are using a cone-shaped dripper, folding the seam of the filter before placing it in the cone can help it fit better and prevent bypass, where water flows around the coffee rather than through it. A well-seated filter ensures that all the water passes through the coffee bed, leading to a more consistent and flavorful extraction.

In practice, the choice between bleached and unbleached is largely a matter of preference and sustainability. Once you have mastered the rinse and adjusted your grind to account for any flow rate differences, you should be able to produce a clean, transparent cup of coffee that highlights the unique characteristics of your beans. If you still detect a papery note, ensure your rinse water is hot and that you are using enough of it to fully saturate the paper fibers.