Use coarsely ground coffee (about 1:4 coffee-to-water by weight)
Choose a container with a lid (pitcher, jar, or French press)
Add coffee grounds to the container
Add cold, filtered water over the grounds
Stir gently to ensure all grounds are wet
Cover and steep in the refrigerator for 12–18 hours
Line a strainer with a paper filter or fine mesh (optional but recommended for clarity)
Strain the coffee into a clean container
Discard the used grounds
Store the cold brew concentrate in the refrigerator up to 7–10 days
Serve diluted (typical ratio: 1 part cold brew concentrate to 1–1.5 parts water or milk) over ice
Adjust to taste by changing the coffee-to-water ratio or dilution level