Step 1: decide how much you want to make and adjust the recipe accordingly. When it’s hot, I like my drinks big, so we’ll use 2 cups or roughly 500 ml of water. The amount of cold brew will be a little less, because of the absorption rate of the coffee beans.
Step 2: Weigh out your coffee. For each cup of water, you’ll need 1 oz or 28 grams of coarsely ground coffee. So, for our big batch, we will use 2 ounces or 56 grams of coarsely ground coffee.
Step 3: combine the coffee and water in the jar, stir to combine, and put on the lid.
Step 4: put the cold brew in the fridge for at least 12 hours. The longer you leave it, the stronger it will be. But don’t be afraid to experiment. I have found that only if you leave the cold brew in the fridge for more than 24 hours, the bitterness starts to increase. Between 12 and 24 hours, it is mainly a more robust flavor that develops.
Step 5: when you are ready to drink your cold brew, you’ll need to strain it. Because you have used a coarse grind, a fine mesh strainer is enough. Pour the coffee straight from the jar in your cup(s) or hipster ball jars. Enjoy!
Pro tip: if I want a really clean cup, I pour my cold brew through a paper filter placed in a drip cone. This catches all the fines, leaving you with a really clean cup of cold brew. If you don’t have a drip cone on hand, you could also place an unfolded handkerchief or a thin cloth in the strainer to achieve the same result.