Choose coarse ground coffee (about 1:8 to 1:10 coffee to water by weight)
Add coffee to a cold brew pitcher or jar
Add cold or room-temperature water
Stir to ensure all grounds are fully saturated
Cover and steep in the refrigerator for 12 to 18 hours
Strain through a fine mesh sieve, paper filter, or coffee filter
Optional: strain again for a clearer brew
Serve over ice or dilute to taste with water or milk
Store in the refrigerator and use within 3 to 7 days