The Chemex produces the cleanest cup of any manual brewer, thanks to its proprietary bonded paper filters which are 20-30 percent thicker than standard pour-over filters. The result is a bright, transparent brew with zero sediment and exceptional flavour clarity that showcases the origin characteristics of single-origin beans.
The classic hourglass-shaped Chemex with a wooden collar. The 6-cup model is the most popular home size and brews 600-700ml. Ensure the pour spout is clear and the glass is clean. Residual coffee oils from previous brews will taint the flavour.
Use genuine Chemex bonded paper filters, not generic cone filters. The thick, double-bonded paper is the defining characteristic of Chemex coffee. Pre-folded square filters or unfolded circles both work. Always rinse before brewing to remove paper taste.
A gooseneck kettle is essential for controlled, even pouring. The Chemex requires precise water placement during the pour phase. A standard kettle pours too fast and too unevenly. Temperature-controlled kettles set to 93-96 degrees Celsius are ideal.
A burr grinder set to medium-coarse. Consistency is critical as the thick Chemex filter amplifies the effects of uneven grind size. Blade grinders produce too many fines which clog the filter and cause bitter, over-extracted results.
Open the Chemex filter and place it in the brewer with the three-layer side facing the pour spout. Pour hot water through the filter to rinse it thoroughly, which removes paper taste and preheats the glass. Discard the rinse water through the pour spout.
Grind 30-33g of coffee to a medium-coarse consistency. Add the grounds to the rinsed filter and gently shake to level the bed. A flat, even coffee bed is essential for uniform extraction during the pour. Place the Chemex on a scale and tare to zero.
Start your timer and pour 60-70g of 93-96 degree water over the grounds in a slow, circular motion, saturating all the coffee evenly. The grounds will bubble and expand as CO2 escapes. Wait 45 seconds. A good bloom indicates fresh beans and sets the foundation for even extraction.
After the bloom, pour in slow, concentric circles from the centre outward, avoiding the edges of the filter. Add water steadily until the scale reads 250g. The pour should be slow and controlled, taking about 30-40 seconds. Keep the water level in the brewer consistent.
Once the water level drops by about one-third, begin the second pour in the same slow circular pattern until you reach 500g total. Maintain a steady, even flow rate. The water should never touch the dry paper above the coffee bed. Keep all water in contact with the grounds.
Allow the remaining water to draw down through the coffee bed completely. Total brew time from first pour to final drip should be 4-4.5 minutes. If faster, grind finer next time. If slower, grind coarser. The finished bed should be relatively flat, not cratered or sloped.
Lift the filter out and discard. Swirl the Chemex gently to mix the brew, as the first portion through is stronger than the last. Pour into pre-warmed cups. The coffee should be clear, bright, and free of any sediment or oiliness. Chemex coffee is best enjoyed black to appreciate its clarity.
Water pools in the brewer and the total brew time exceeds 5-6 minutes. The resulting coffee is bitter and over-extracted.
The coffee lacks body, flavour intensity, and depth. It tastes thin even though you used the correct ratio.
The coffee has a cardboard-like, papery flavour that is clearly not from the beans.
