The National Coffee Association recommends a cold brew ratio of 1 gram of coffee to 4 or 5 grams of water. Your fridge can ruin a good batchCoffee absorbs smells, and a jug of cold brew sits in your fridge for days. The best coffee for cold brew, sorted by what you want out of itBest for making a lot of it cheaplyIf cold brew is a daily habit, buy in bulk and let the method cover for the beans. Best for cold brew you drink with milkLook for coffees described as chocolatey, nutty, full-bodied, or low in acidity. Purity’s clean cold brew coffee comes in whole bean and in a coarse grind, which settles the grind question before you get to anything else.