How To Make Cold Brew Coffee
1 cup (113 grams) whole coffee beans
4 cups (907 grams) water
Coarsely grind the coffee
Grind the coffee beans on the coarsest setting on your grinder, or in short 1-second pulses in a spice grinder. The grounds should look like coarse cornmeal, not fine powder. You should have just under 1 cup of grounds.
Combine the coffee and the water
Transfer the coffee grounds to the container you're using to make the cold brew. Pour the water over top. Stir gently with a long-handled spoon to make sure the grounds are thoroughly saturated with water.
Cover the jar with a lid or a small plate to protect it from dust and bugs. Let the coffee steep for about 12 hours. The coffee can be left on the counter or refrigerated; steeping time is the same.
Store the coffee
Transfer the coffee to a small bottle or jar and store in the fridge for up to a week.