Go to Levain Bakery (167 West 74th St) instead. The cookies are marvelous.
Aaron, I was just going to suggest Levain! Those cookies changed my life!Magnolia on the Upper West Side is never crowded, at least when I've been. And I wouldn't suggest the cupcakes. I'd suggest the banana pudding or key lime cheesecake.
I feel no need to visit bakeries in other cities when we have Sprinkles right here in Orange County.