BREWING WITH

CHEMEX

Chemex

AT A GLANCE

COFFEE        32g

WATER        500ml  [95°C to 99°C]

0:00 1st   POUR 100ml

5 STIRS

1:00  2nd POUR 200ml [CIRCLE]

3:00  3rd POUR 200ml [CIRCLE]

5:00  FINISH

INTRODUCTION

For many, the Chemex is the ultimate home-brewing filter device, and was called by the Illinois Institute of Technology “One of the best-designed products of modern times”. Created in 1941 by American Peter Schlumbohm, it has enjoyed over half a century of popularity, and can be found in homes and cafes across the world. It is famed for its clean, juicy cups of coffee, its unique design features, and its aesthetics. The design falls under standard cone-shaped brewers, but with the interesting choice to have the brewer and decanter built from a single piece of glass. The smooth walls of the brewer reduce bypass significantly, and it utilises a spout on the side to function as both a means of reducing pressure inside the brewer to allow it to drain, and as a nice way to pour out your delicious coffee once brewed. Its paper filters are also unique, and whilst they make a few variations, they are all much thicker than your usual filter papers, resulting in the famous cleanliness of its brews. The standard and most popular Chemex papers do however feature a significant flaw, that the folding papers produce a 3-ply filter on one side, and 1-ply on the other, thus creating uneven extraction — and this is the primary reason it has failed to gain popularity in the specialty café world. Luckily there is a little hack you can do at home to fix this with just a pair of scissors, and you can find out about it online. The chemex itself comes in a wide range of variation, primarily focused on creating larger or smaller amounts of coffee, ranging from the small 3-cup size, all the way up to a over-the-top 10cup brewer.

We are using the original 6-Cup brewer, and whilst it is possible to brew larger or smaller amounts in this brewer, it will suffice to say that the Chemex was designed to be a social brewer, with its simplicity and large capacity, and so our recipe is designed to brew a bigger amount of coffee, great for 4 people, and still taste delicious. We also love to use the Chemex Filter hack mentioned earlier, and whilst this is entirely optional, it is recommended for more consistent, cleaner cups of coffee.

METHOD

What you’ll need

  • Chemex Brewer and filter paper
  • 32 grams of coffee
  • Grinder
  • Water
  • Kettle (preferably gooseneck)
  • A scale/timer
  • Decanter
  • Some cups

 

Steps

  1. Grind 32 grams of coffee to a coarse setting (similar to cafetiere).
  2. Heat your water up to between 95°C and 99°C.
  3. Place the filter paper into the Chemex, and thoroughly rinse it with hot water, then discard of the water.
  4. Place the Chemex on the scale, weigh in the coffee and level out the bed by giving it a gentle shake; then tare the scale.
  5. Start the timer and begin pouring the first 100ml, quickly, in order to saturate the coffee. Finish the pour in the centre of the brewer.
  6. As soon as the water has been poured, stir the bed 5 times to ensure all the grounds are wet.
  7. By 1:00 minute all the liquid should have drained. Next pour 200ml in slow circles until you reach the 300ml.
  8. By 3:00 minutes all the liquid should have drained. Next the final 200ml in slow circles.
  9. Once all the liquid has drained, remove the filter paper and discard of it.
  10. Swirl the Chemex to mix the brew. Then serve and enjoy.

 

How to adjust

  1. Using hotter water temperatures will give you a sweeter cup, whereas using cooler water will generate a brighter, more acidic brew.
  2. Try finer ground coffee for a sweeter, thicker more bodied cup, and coarser ground coffee for a lighter cleaner cup.
  3. You can increase or decrease your dose to get a stronger or weaker brew.

chemex001
FOR THE GEEKS

This section is for those who want to go all in. It provides the extra details regarding our method, as well as the results we get when brewing, and are to serve as both guidance, and reference for those who want it.

Extraction

     Grind:                    850μm – 900μm

     Yield:                     ≈85 % [425ml]

     TDS:                       1.48%

     EY:                          19.43 %

Water content

     pH:                          7.0

     PPM:                      105

Ready to do some practice?

80 STONE COFFEE ROASTERS LONDON

Speciality Coffee Suppliers

80 Stone Coffee is a speciality wholesale coffee supplier with a long and passionate story for all things coffee. All our coffee beans are roasted in our London based roastery. Browse our shop to see the different beans we have to offer. We not only provide you with the best La Marzocco equipment but we provide some great barista training.