Chemex Brew Guide

Chemex Brew Guide

Posted by on March 20, 2020

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

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 = 1:167
Grind = Medium – Coarse grind, grind should be coarser than drip brewer but finer than French press. 

 

STEP BY STEP CHEMEX PREPARATION:

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