Simplified recipe: Combine equal parts fresh squeezed pomegranate juice and pure cane sugar in a high speed blender. Blend on high until the sugar is completely dissolved. Store in fridge.
For best results: Use a kitchen scale to weigh the sugar and pomegranate juice (500 grams each) instead of using measuring cups. Add 2 ounces of pomegranate molasses and 2 teaspoons of orange blossom to the blender before blending to give the grenadine better depth and more pronounced floral notes.
Bonus tip: If you plan on using your grenadine over an extended period of time (more than a couple of weeks), add an ounce of vodka to the recipe and it will stay fresh longer.