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Chemex Ratio: Coffee Beans to Water

How to use a Chemex
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Making pourover coffee and need a Chemex recipe? Here’s the Chemex ratio: this simple formula makes for a perfect cup of coffee every time.

Ingredients

Scale
  • 34 grams light or medium roast coffee beans*
  • 520 grams filtered water (the flavor is best with filtered water)

Instructions

  1. Heat a pot of filtered water to 200 to 205F. We use an electric kettle that shows us the exact temperature. You could also use a teapot on the stove — just heat to boiling, then let the water cool down for a few minutes.
  2. Use a food scale to weigh out 34 grams of coffee, then grind it to a medium coarse grind (about the size of kosher or sea salt). We use an electric burr grinder to get a consistent grind.
  3. When the water is heated, place the filter in your Chemex (see the video below for exact instructions). Pour in just a bit of water to wet the filter, then pour out the water into the sink. Place the ground coffee into the Chemex and shake it to level it out.
  4. Place the Chemex on the food scale and tare it so the scale reads 0. Slowly pour in 70 grams of water in a circular motion. Then stop and wait for 1 minute: this allows the coffee to bloom (you may have to tap your scale once so that it doesn’t time out!).
  5. Then slowly add the remaining 520 grams water in two batches, pouring very slowly in concentric circles, pouring right onto the coffee and not touching the coffee filter. Fill to about 1/2 inch from the top (it will likely be around 400 grams water), wait for the water level to go down a bit, and then fill the remaining water up to 520 grams.
  6. After a few minutes, all of the water will filter through the coffee grounds into the pot below. Remove the filter and discard it (we compost ours).  Enjoy!

Notes

*In our large Chemex, the most you can make at one time is 50 grams of coffee and 800 grams water, which makes about 3 to 4 cups of coffee. To scale up or down, just use our magic ratio: 15-16 grams water to 1 gram of coffee.

Find it online: https://www.acouplecooks.com/chemex-ratio-coffee-beans-to-water/