Chemex Coffee Brewing Guide
The Chemex is a glass pour-over brewer and serving carafe best known for its hourglass shape and unusually thick bonded paper filters. Those filters remove a large amount of suspended fines and oils, which is one reason Chemex coffee is often described as clean, transparent, and relatively light in body.
The brewer is simple, but the large filter and deep coffee bed make grind size, pouring pattern, and drawdown especially important.
What makes a Chemex different?
| Feature | Practical effect |
|---|---|
| Thick paper filter | High filtration of oils and fine particles; very clean cup |
| Large cone | Works well for larger multi-cup brews |
| Glass carafe and brewer in one | Simple workflow and easy serving |
| No flow-control valve | Drawdown depends on filter, grind, dose, and pouring |
A practical starting recipe
A useful starting point is approximately 1:16 to 1:17 coffee to water by mass. For example, 30 g of coffee with 480–510 g of water. Treat this as a starting range rather than a rule.
- Place the folded Chemex filter with the thicker multi-layer side against the spout.
- Rinse thoroughly with hot water to seat the paper and preheat the glass, then discard the rinse water.
- Add medium to medium-coarse ground coffee and level the bed.
- Bloom with roughly two to three times the coffee dose in water and allow the bed to become evenly saturated.
- Continue with controlled pours, keeping the water level reasonably stable and avoiding aggressive pouring directly onto the paper wall.
- Allow the brew to finish draining, then swirl the carafe before serving.
How to adjust grind size
If the brew drains much too quickly and tastes thin, sour, or underdeveloped, grind finer. If it stalls, runs excessively long, or tastes dry and harsh, grind coarser after checking whether excessive agitation or fines migration is also slowing the filter.
Because Chemex paper is relatively restrictive, a grinder that produces many fines can create very long drawdowns. That does not mean every long brew tastes bad, but brew time is a useful diagnostic signal when compared with flavor.
Pouring technique
Both circular and center-focused pouring can work. Circular pours distribute water across more of the bed but can create more agitation. Center pours can reduce wall disturbance and may help manage a coffee that tends to stall. The right method depends on dose, grinder, filter behavior, and the flavor you want.
Why rinse the filter?
Rinsing seats the paper, preheats the brewer, and can remove loose paper aroma. Make sure rinse water is discarded before brewing. The thick paper is part of the Chemex flavor profile, so replacing it with another filter changes both flow and filtration.
Chemex vs immersion brewing
Chemex is primarily a percolation method: fresh water passes through the bed and exits as brewed coffee. A French press is immersion brewing because grounds remain in the full brew-water volume during steeping. For more detail, see our published immersion vs. percolation brewing guide.
Watch: Lance Hedrick’s Chemex Brew Guide
Lance Hedrick explains how Chemex filter design, grind size, agitation, bypass, and pouring choices affect extraction and cup clarity. His approach is especially useful when a standard Chemex recipe produces stalled drawdowns or muted flavor.
Browse coffee brewing equipment at Espresso Outlet, or explore related terms such as bloom, brew ratio, drawdown, paper filter, percolation brewing, pulse pouring, and pour rate in the Coffee, Espresso & Brewing Equipment Glossary.
