I just came back from my 7 day trip to NYC. I was on a mission. A cupcake a day. Thank god I didn't actually do this (though it was my bday week so I deserved it).
The BEST cake. Pricey, but enough for 2. Dean & Deluca's. My best friend introduced me to the yellow cake with white frosting. That cake. Oh my god. It was even better when I had the last bite in the afternoon. (Make sure that they are the cupcakes made by D&D- they also sell crumbs which i did not try and Little Red Hens which had really great cream cheese frosting, but the cake on the dry side; not as dry as Buttercup though).
Buttercup Cafe. Dry. Would not go back. Had the red velvet. Good Icing though.
Sugarsweet sunshine. AAAAHHH. The perfect little cupcake. $1.50. Reminded me of cupcake wednesdays in grade school.
Magnolia. I didn't make it this trip. Which I have for the last 4 years or so. They still have the best Banana Pudding.