1. Coarsely grind the coffee: The grounds should look like coarse cornmeal, not fine powder. You should have just under one cup of grounds.
2. Combine the coffee and water: Transfer the coffee grounds to the container you’re using to make the cold brew. Pour the water over the top. Stir gently with a long-handled spoon to make sure the grounds are thoroughly saturated with water.
3. Steep overnight: Cover the jar and let the coffee steep for about 12 hours.
4. Strain the coffee: Line a small strainer with cheesecloth and place over a large cup or bowl. Pour the coffee through the strainer.
5. Transfer the coffee to a small bottle or jar and store in the fridge for up to a week.
6. Dilute the coffee with as much water or milk as you prefer. Serve over ice or warm for a few minutes in the microwave.