Grind coffee beans coarsely
Add coffee grounds to a jar or pitcher
Use a coffee-to-water ratio of about 1:4 to 1:8, depending on strength preference
Pour cold or room-temperature water over the grounds
Stir gently to make sure all grounds are saturated
Cover the container
Let it steep in the refrigerator or at room temperature for 12 to 24 hours
Strain the coffee through a fine mesh sieve, cheesecloth, or coffee filter
Discard the grounds
Dilute with water or milk if desired
Serve over ice or chilled