Best coffee for Chemex: what to look for and our pick

The best coffee for a Chemex is a washed, brighter coffee that the thick paper filter can show off cleanly: from our three closest fits, that is No. 9 Optimism, a washed Tanzanian at medium-light roast with pear, floral, jasmine and strawberry notes. If you want something even brighter and do not mind a coffee with no printed roast level, No. 4 Conjuncture is worth trying too. Here is what actually matters for this brewer and the honest trade-offs between the two.

What a Chemex actually changes

A Chemex uses a thicker paper filter than most pour-over cones, which pulls out more oil and fine sediment than a metal filter or a thinner paper does. The result is a very clean cup that shows acidity and aromatics clearly, and tends to mute heavier, chocolatey coffees rather than round them off the way a French press would. That is why washed, brighter coffees are usually the better match for this brewer, more than for drip or a press.

Process and roast

Fully washed coffees, where the fruit is removed before drying, tend to read cleaner and are a natural fit for how much a Chemex filter strips out. Both Optimism and Conjuncture are fully washed. A lighter or medium-light roast also tends to preserve more of the acidity and florals that a Chemex is good at showing, which is part of why Optimism, at medium-light, works well here. Conjuncture does not carry a declared roast level from the roaster, so judge it by the notes on the label rather than an assumed darkness.

Grind and pour

Pour in stages rather than all at once: a short bloom to let the grounds degas, then two or three slower pours in circles, keeping the water level from rising too close to the filter's rim.

Filter paper matters too

A Chemex uses its own thicker filter paper, sold as bonded, natural or pre-folded circles, and the type you use changes the result almost as much as the coffee does. Bonded filters are denser and remove more sediment and oil, giving the cleanest possible cup, which suits a bright, washed coffee like Optimism or Conjuncture well. If your cup tastes weaker than expected even with the ratio above, try rinsing the filter with hot water before adding grounds, since a dry filter can add a papery taste that mutes a lighter roast more than a darker one.

Storage and freshness

Buy whole bean and grind right before brewing. A Chemex is unusually good at showing staleness, since the clean cup it produces has nowhere for a flat, tired coffee to hide behind body or oil the way a French press would. Keep the bag sealed between uses and expect the best cups in the first few weeks after the bag arrives.

The honest trade-offs

Optimism loses more of its character as it cools than a heavier coffee would, so it rewards drinking it soon after brewing rather than letting it sit. Conjuncture is brighter still, orange and lemon rather than floral, and without a declared roast level it takes a little more trust in the label notes than a coffee with a stated roast. No. 2 Good Sense, a natural Ethiopian, is the outlier of the three: naturals tend to carry more body and fruit-forward sweetness that a Chemex filter can mute, so while it is a genuinely good coffee, it is not the cleanest fit for this specific brewer.

Who should buy which

Start with Optimism if you want a straightforward, floral, classic Chemex cup. Move to Conjuncture if you have brewed a few batches and want something even brighter and more citrus-forward. Save Good Sense for a different method, like a pour-over cone or drip, where its natural process has more room to come through.

Compare all three, and the rest of the ten, on the coffee collection page. If pour-over in general is new to you, our guide to brewing Colombian coffee pour-over covers the basics that carry over to a Chemex. The subscription takes 11 percent off any bag, skip or cancel in one click.

Pick for process and roast first, brewer technique second. Both matter, but the bean sets the ceiling.