Shake Shack has their new holiday milkshake.

But actually there are three of them. Let's start with the sugar cookie one, which is by far based on one of the most iconic holiday desserts. I present to you the sugar cookie Milkshake. This one has frozen apples. Apple cider custard and some Whipped cream and apple cider donut crunch. Next, there's the chocolate Youl log shake.