How to Brew Coffee with a Chemex: Step-by-Step Guide

If you’ve ever watched someone make coffee with a Chemex and wondered how they get such a clean, aromatic cup, you’re not alone. The iconic hourglass-shaped glass brewer has remained nearly unchanged since 1941, when German inventor Peter Schlumbohm designed it as 'synthetic logic meets controlled madness.' But behind its elegant wooden handle and leather tie lies a carefully engineered system for producing a bright, nuanced pour-over coffee.

To brew with a Chemex, you’ll need freshly ground coffee, hot water, a gooseneck kettle, and the Chemex filters—then follow a simple 12-step process including bloom, pouring, and dripping. The entire brew typically takes under 4 minutes once water is heated, and uses a standard coffee-to-water ratio around 1:15 to 1:16 for balanced extraction.

What Is a Chemex and Why Use It?

The Chemex Coffeemaker is a glass pour-over device invented in 1941 by Peter Schlumbohm. Its distinctive hourglass shape is made of non-porous, heat-resistant borosilicate glass, paired with a wooden collar and leather tie. Unlike standard drip machines, the Chemex offers full control over water temperature, pour rate, and contact time—resulting in a clean, sediment-free cup that highlights origin characteristics without over-extraction bitterness.

How the Chemex Brewing Process Works

Brewing with a Chemex is a manual pour-over method that relies on precise steps: heating water, folding and placing a specialized thick filter, blooming the coffee grounds, and pouring water in stages to fully extract soluble compounds. Each stage affects clarity, body, and aroma. The Chemex’s thicker paper filter also removes more oils and fines than standard paper, contributing to its signature clean taste.

Step-by-Step: Making Coffee with a Chemex

Follow these essential steps to brew with a Chemex:

• 1. Heat Your Water: Begin by heating filtered water to approximately 90–96°C (195–205°F). You’ll need enough for both preheating and brewing—typically around 500–700ml depending on your batch size.
• 2. Measure Your Coffee: Use freshly roasted whole beans. A standard brew uses around 30–40g of coffee, depending on your desired yield.
• 3. Grind the Coffee: Grind your beans to a medium-coarse consistency, similar to sea salt. This grind works best with the Chemex’s thicker filter and slow flow rate.
• 4. Prepare the Filter: Take a Chemex-specific paper filter and fold it in half, then in half again to form a cone. Place the folded filter into the top of the Chemex with the triple-layered side facing the spout.
• 5. Rinse the Filter: Pour hot water through the filter to rinse it—this removes any paper taste and preheats the Chemex. Discard the rinse water.
• 6. Add Coffee Grounds: Put the freshly ground coffee into the rinsed filter. Aim for an even bed with no clumps.
• 7. Start the Bloom: Begin your timer and pour just enough hot water (about twice the weight of the coffee) to saturate the grounds evenly. Let it sit for 30–45 seconds. This releases trapped CO₂ and primes the coffee for even extraction.
• 8. First Pour (Bloom Extension): After the bloom, continue pouring in a slow, steady spiral, starting from the center and moving outward, avoiding the edges. Add around 50–60% of your total water in this phase.
• 9. Second Pour (Main Extraction): After a brief pause, pour the remaining water in stages, maintaining a consistent flow and even saturation. Total brew time should be around 3:30–4:30 minutes.
• 10. Allow Dripping to Finish: Once all water has been poured, let the coffee fully drain through the filter. Do not press or disturb the grounds.
• 11. Remove the Filter: Lift out the filter with the spent grounds and discard.
• 12. Serve: Pour the brewed coffee into pre-warmed cups or a server. Enjoy immediately for the best flavor.

Why These Steps Matter

Each stage in the Chemex process—from bloom to final pour—affects how coffee solids dissolve into water. The thick filter slows extraction and removes more sediment and oils, leading to a lighter, brighter cup. Timing, water temperature, and pour technique determine balance, clarity, and body. Getting these right highlights the coffee’s inherent qualities without over- or under-extracting.

Troubleshooting Your Chemex Brew

Common issues include over-extracted bitter coffee (often from too fine a grind or too long a brew time), or under-extracted sourness (from too coarse a grind, too short a brew, or insufficient agitation). Adjust grind size, water temperature, or pouring technique to refine your results. Consistency is key.

Recommended FrontStreet Coffee Beans for Chemex Brewing

For Chemex brewing, we recommend FrontStreet Coffee’s Ethiopia Yirgacheffe for its bright floral notes and citrus acidity, perfect for highlighting the Chemex’s clean profile. Alternatively, try the FrontStreet Colombia Huila for a balanced cup with caramel and nutty undertones. Both beans respond well to the Chemex’s slow, filtered extraction, showcasing clarity and complexity. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.