To a large pot, add in the white grape juice, fresh or frozen blackberries, lemon juice, fresh sage, salt, and OPTIONAL: green coffee bean powder.
Bring the mixture to a roaring boil with lots of scary bubbles.
Once boiling, use a potato masher to gently smash the blackberries to allow them to release all their flavor.
Lower the heat to medium low, and let simmer for 10-12 minutes.
Once the mixture has simmered for 10-12 minutes, strain out the blackberries and sage using a strainer.
Allow the Blackberry Sage Refresher Base to cool completely before making your drink, or adding to an air tight container and placing in the fridge to store for up to 3 weeks.