Now, before you nail your julep, you have to nail your cold brew. I love 'set-it-and-forget-it' type recipes, and cold brew is basically the slow cooker method of coffee brewing. It takes about 2 minutes of actual labor to set up the brew, then time takes over and does the rest of the work for you. And the best part? Cold brew keeps well in the fridge, so you can brew a whole week's worth of coffee all at once.