How to Brew Coffee with a Chemex

How to Brew Coffee with a Chemex

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Making Coffee with an 8 Cup Chemex Brewer

This brew method was designed by German Chemist, Peter J. Schlumbohm, in 1941. It was once considered to be “one of the best-designed products of modern times”, and is included in a collection at the Museum of Modern Art in New York City. Chemex filters are 20-30% heavier than other filters so they retain more of the suspended oils during the brewing process and solids cannot pass through the filter. Brew characteristics: Medium body, clean cup and clarity of flavors.

What you will need:

  • 40g freshly roasted coffee
  • 195-205 degree water 
  • Scale 
  • Timer

Frothy Monkey Chemex Standards

Dose = 40g coffee
Bloom = 80g water for 45 seconds
Final water weight = 680 g
Pour time = 3:30 min
Brew time (total time) = 5-6 min
Coffee to water ratio = 1:17
Grind = Medium – Coarse grind, grind should be coarser than drip brewer but finer than French press. 

Step By Step Chemex Preparation

STEP 1 • Weigh out ~40 g of your favorite coffee and grind about the size of coarse sea salt.

STEP 2 • Place the filter in the Chemex and make sure the three-layered side of the filter is towards the spout to prevent the filter from being sucked into the spout. Heat Chemex and filter by pouring hot water through them both; this will also help reduce the flavor imparted by the paper. 

STEP 3 • Pour the water out of the back of the Chemex, while leaving the filter in place.

STEP 4 • Fill up a gooseneck kettle with 195-205 degree water (wait 30 seconds after boiling).

STEP 6 • Place Chemex with the filter on scale and zero. Add exactly 40 g of freshly ground coffee to the filter and level. Zero scale again.

STEP 7 • Start the timer and pour ~80 g of water over the coffee, being sure to wet ALL the grounds. Allow the coffee to sit until the timer reaches 45 seconds before adding more water; we call this “the bloom” or “de-gassing” and it is when the coffee is releasing gasses trapped in the grounds.

STEP 8 • At 45 seconds add 150 g of water by slowly pouring water over the coffee in small circles moving around the coffee bed but avoiding the edges of the filter. Use a spoon to stir the grounds and water to ensure all grounds are wet.

STEP 9 • Pour another 150g of water at 1:30, 2:30, and 3:30 finishing at exactly 680g.

STEP 10 • Swirl the Chemex to help create a flat, even bed.

STEP 11 • Allow the coffee to continue to drip until all of the coffee has drained. (this should happen at 5-6 minutes).

STEP 12 • Remove filter and grounds, swirl your Chemex, and pour into your favorite coffee mug.

Chemex Brewing Equipment Available on Our Online Store

Visit the links below or the online store link above to find the necessary brewing equipment to make a Chemex brew of your own.


Frothy Monkey