Syrups & Cordials
Fill a large basin with water and place an immersion circulator inside. Set the circulator to 135°F. Put all the ingredients in a bowl and whisk until blended. Transfer to a sealable, heatproof plastic bag. Seal the bag almost completely, then remove as much air as possible by dipping the bag (other than the unsealed portion) in the water. Finish sealing the bag, then remove it from the water. When the water has reached 135°F, place the bag in the basin and cook for 2 hours. Place the bag in an ice bath and let cool to room temperature. Pass the cordial through a fine-mesh sieve lined with several layers of cheesecloth. If any particles remain in the cordial, strain it again through a paper coffee filter or Superbag. Transfer to a storage container and refrigerate until ready to use, up to 2 weeks.