There are variations but a simple method of cold brewing coffee is;
1. In a large pitcher stir together 2 cups ground coffee with 3 1/2 cups room temperature water. Cover the pitcher with plastic wrap and allow to sit at room temperature for 12-24 hours.
2. Fit a coffee filter over a fine mesh strainer and filter. This will take some time to filter all the grounds.
3. Add ice, milk, cream, sugar or whatever you normally like with your coffee.
Be aware that this will be a strong brew and you may want to add water. Add hot water or microwave to enjoy a hot, less acidic, cup of coffee.
Covered and refrigerated cold brew coffee will last up to 5 days.