Combine water and coffee in a french press or large pitcher or jar with a lid. Be sure to stir to moisten coffee grounds.
Let soak for 12-24 hours. Strain using the French press, a cheese cloth or coffee filter over a fine mesh sieve (see post above for more detailed notes).
Sweeten or add cream as desired (if you wish to sweeten, I recommend a liquid sweetener or coffee syrup as sugar won't dissolve easily in cold coffee).
Video
Notes
We prefer a 1:6 coffee to water ratio. If you like stronger cold brew coffee, I would recommend a 1:5 or 1:4 coffee to water ratio (so 1 cup grounds to 5 or 4 cups water - the less water you use, the stronger it will be).