Chemex Brewing Guide


The Pour-over method of coffee brewing is quickly gaining in popularity among coffee enthusiasts. Not only will this method provide you with a greater level of control throughout the coffee brewing process, it is also cost effective to use at home because you don’t need any super expensive equipment to get started. At Greenstreet, we use the Chemex brand of pour over coffee makers, so that’s what we’ll be using in this guide

What you’ll need to get started

Here’s what we recommend using for your pour-over coffee setup. Of course, if you don’t have some of these items exactly, that’s fine, you can substitute!


Ready to get started? Just follow these steps to brew the perfect cup of coffee on your Chemex!

1. Grind Coffee to Medium Coarseness with a Burr Grinder

It is important for the coffee to be a medium grind, and to be ground with a quality burr grinder. If the water stalls in the grounds and produces an over extracted and bitter coffee – your grind is too fine. If the water pours through too fast, and the resulting coffee is weak – then the grind is too coarse. By simply adjusting the grind size, you will see and taste differences.

2. Properly Unfold & Place The Filter

If you’re using the square Chemex-Bonded Coffee Filter, fold across and then open from the center, as shown in the illustration below:


If you have the circle filter, then fold in half (moon shape) then across again (triangle with rounded end), as shown below.


One side should have 3 layers, the other side 1 layer. Make sure the three thickness of the filter are across the vent (if filter collapses into the vent it will slow or stop the coffee flow).

3. Add 25 Grams of Coffee Per 12 oz Cup

Coffee ratio should be 25 grams per 12 oz. cup, into the filter cone. One teaspoon is approximately 5 grams of coffee but you can find a digital scale for around $40 if you want to be precise.


4. Bring Water to Boil, Then Let Rest 30 Seconds

Use a kettle with goose-neck spout for precision pouring. When the water is boiling, remove the kettle from the heat for 30 seconds. The perfect brewing temperature is 195 to 205 degrees F.

5. Pre-Wet the Grinds to Allow Coffee to Bloom

Pour a small amount of water over the grinds, just enough to wet the surface of the coffee, without floating them. This pre-wetting allows coffee to “bloom,” to swell and prepare for even infusion brewing. It is sometimes counter intuitive because it does not look like all coffee will wet, but trust us it will bloom and cover all the coffee!


6. Slowly Pour Water in Circular Motion

After this first wetting, simply pour more water, soaking the grounds each time, but keeping the water level well below the top of the coffee maker. Pour slowly in a circular motion, being sure to keep the coffee in as compact an area as possible. Don’t let the grinds go dry during the brew process to prevent temperature loss. Don’t pass too much water through the grounds or you will have weak coffee with over-infused bitter components in it.


7. Dispose the Grounds and Serve

Once the desired amount of coffee is brewed, dispose of the spent grounds by lifting the filter out of the coffee maker.Replace the filter with a Chemex Glass Lid to help keep the coffee hot. Applying heat to keep the coffee hot is not recommended as it will develop an unpleasant flavor.

Chemex Size Guide
  • Chemex comes in 1, 3, 6, 8 and 10 Cup Sizes.
  • Chemex Measures a ‘cup’ by 5 US Fluid Ounces.
  • The ‘nipple’ or button on the Chemex brewer represents half of its size.
  • An 8 Cup Chemex can produce a maximum of 40 oz coffee. The button will mark 20 oz of coffee.
Chemex Guide Download

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