The first time I went to Stand two years ago, the burger experience was just okay, and worse was their thin pistachio milkshake, which contained shards of inedible pistachio shell (at least I knew it had real pistachios in it). I gave it a second chance just this week: The burgers tasted a bit better (although I wouldn't call it one of my favorites) and, on a brighter note, the toasted marshmallow milkshake was great. Much thicker, seemingly 100% larger than last time for the same price, no risk of inedible shell bits, and wasn't overly sweet. The glass was topped with a mass of gooey, lightly marshmallows and swirls of whipped cream. Now I know where to go if I'm ever in Union Square and crave an ice cream-y dessert.