To get something similar at Starbucks, you'll need to ask for an espresso macchiato since there are other non-traditional macchiato drinks on the menu. For example, the iconic caramel macchiato ...
resulting in a layered drink that is quite different from a traditional macchiato. The Potion Macchiato is no different, and according to Dunkin' itself, "This showstopping beverage blends layers ...