"Concretes exist in the liminal zone where a milkshake technically starts to become an ice cream. This is actually a very good place to be in indeed. A clever aspect of Shake Shack’s seemingly never ending roll out is the exclusive concrete, whereby each location has its own version, often collaborations with established names like St John or Mast Brothers. One of the most satisfying is the Victoria specific one, with peanut butter, salted caramel, salted peanuts and Paul A Young chocolate, a concoction one imagines would also be satisfying to throw. First milkshakes, then concrete(s) — it’s a slippery slope." - Jonathan Nunn
