There are many thing about New York I miss, but one of the top things has to be Black and White cookies. I haven't even seen one of these cookies in the wilds of Philadelphia.
However, I will be in New York City at the end of the month, and I will purchase myself a cookie. Then I will take a GIGANTIC bite out of that cookie. Perhaps I will also buy some milk, though I can get that in Philadelphia.
You can read more about these wonderful cookies at kottke.org. If you haven't had one, believe me you owe it to yourself to get to New York and have one. Also, they are NOT called Halfmoon cookies. If someone tries to tell you otherwise kick them in the knee and proclaim loudly, "I will not be seduced by your fast talking big city ways. Good day, sir!"