In a large jar or pitcher, combine the coarsely ground coffee beans and cold water.
Stir gently to ensure all the coffee grounds are wet.
Cover the jar or pitcher and let it steep at room temperature for 12-24 hours. The longer it steeps, the stronger the cold brew will be.
After steeping, strain the cold brew through a fine-mesh sieve or a coffee filter to remove the coffee grounds.
Transfer the strained cold brew to a clean jar or pitcher and store it in the refrigerator.
Serve the cold brew over ice, diluting with water or milk as desired, and enjoy!