Step 1

Grind and steep: Use a coffee/spice grinder or blender to grind beans until coarse (see note 1). Transfer ground beans to a mason jar. Add water. Stir thoroughly to wet coffee beans. Cover and put the jar in the fridge for about 16 hours.

Step 2

Strain: Pour mixture through sieve lined with a paper coffee filter or nut milk bag to strain. Refrigerate, in the sealed jar, until ready to use. Add ice and milk of choice, if desired.