2 oz fresh squeezed grapefruit juice about half a grapefruit)
2 oz filtered water
½ granulated sugar
8 blackberries
zest from one grapefruit
Instructions
Combine all ingredients in a small saucepan. Slowly bring to a boil, stirring until sugar has dissolved. Remove from heat and let sit for 5 minutes. Gently squeeze the blackberries against the side of the pan to help release the juices.
Strain into an airtight container, and keep covered and refrigerated.
Recipe by the modern barista at https://themodernbarista.com/index.php/2018/08/02/kenya-cold-brew/