Anyone made grenadine?
Yup - you need two parts pomegranate juice to one part superfine sugar (I usually use 16 oz juice to 8 oz sugar).
Bring the juice to a simmer over medium and reduce by 1/2.
reduce heat, add sugar and stir it until it's dissolved.
bring to room temperature, then chill. It should last fine for a while if you keep it in the fridge.