A mason jar is perfect for making cold brew. Not only does the jar seal well, it makes a great conversation piece as it sits on the counter for several hours.
Here's what to do:
- Grind the beans right before you start brewing. You want to use a coarse grind size. The grounds should resemble very course salt.
- Measure out the coffee. You want to use of ratio of 10 grams of ground coffee for every 100 grams (milliliters) of water.
- Place the measured coffee grounds in the bottom of the mason jar and cover with the room temperature water
- After five minutes, use the back of a spoon to push down any grounds that have formed a crust on top.
- Seal the mason jar and place it in a cool location out of direct sunlight for twelve to fifteen hours.
- Cover a bowl or second mason jar with a piece of cheesecloth. Unseal the brewing jar and slowly filter out the grinds. Warning: We tried sealing the mason jar with a coffee filter and it took forever. Don’t do that.
Pour and enjoy!