Open Chemex filter and place inside Chemex. Heat water to boiling and thoroughly wet filter to remove any flavor from filter paper. Pour out all excess water.
On a Medium Coarse setting, grind and weigh out 30 grams of ground coffee. If a gram scale is not available about 5 teaspoons will get you close. Adjust for taste. Tare scale to zero.
With a focused pour, wet grounds with approximately 50 mL of water and allow to soak for around 30-45 seconds.
Begin pouring slowly in a spiral motion in approximately 100 mL increments. The total amount of water should be around 500 mL. If no scale is available the volume of water for a large Chemex (shown) should reach the marker dimple.