fresh berries (such as raspberries, blackberries, blueberries, or strawberries), sliced, quartered if large, in a medium bowl with a fork. Step 3Stir 1 cup vinegar (such as red wine, white wine, apple cider, white balsamic, or unseasoned rice) into strained syrup to combine. Taste shrub and add more sugar or vinegar to your liking—it should taste both sweet and sharp but not overpowering in either direction (keep in mind the flavors will meld as the shrub ages). Pour shrub into a clean jar; cover with lid and chill until flavors come together and mellow, about 1 week. Do Ahead: Shrub can be made 6 months ahead.