Chemex Brewing Guide

Chemex Brewing Guide

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 need for this brew:

• 6 cup Chemex brewer  
• Chemex filters  

• Grinder  

• Pour over kettle  

• 40g freshly roasted coffee

• 195-205 degree water 

• Scale 

• Timer

What you will need to brew a Chemex


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 1 • Place the filter in the Chemex, make sure the three-layered side of the filter is towards the spout to prevent the filter from being sucked into the spout.

Steps 1 + 2 : Place filter and wet

STEP 2 • 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 : weigh out coffee

STEP 4 • Weigh out ~40 g of your favorite coffee and grind about the size of coarse sea salt.

Medium-coarse grounds

STEP 5 • Fill up gooseneck kettle with 195-205 degree water (wait 30 seconds after boiling).

Step 6 : Add coffee and zero scale

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 : First pour

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 ‘the bloom’ or ‘de-gassing’ and it is when the coffee is releasing gasses trapped in the grounds.

The bloom

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. 

Step 9 : Continue pour

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

Step 10 : A nice flat bed

STEP 10 • Allow the coffee to continue to drip until you have a slow drip (this should happen at 5-6 minutes). You should have a nice flat bed of coffee in your filter.

Step 11 : Pour and enjoy

STEP 11 • Remove filter and grounds, swirl your Chemex, and pour into your favorite coffee mug.

Frothy Monkey