Mallomars
If you have never experienced the sweet, holy, pure goodness that is the Mallomar, you have not yet lived.
The thing is, if you live outside the great city of New York, chances are, you don't even know what I'm talking about. This Nabisco product proudly proclaims on the back of the new packging, that more than 70% of Mallomars sales are generated in the shadow of the Big Apple.
Apparently, New Yorkers conspired with Nabisco to do everything possible to keep this precious secret from the rest of the country and the world. It doesn't even show up on Nabisco's designed-for-a-three-year-old's-attention-span website. It is indeed quite rare to find a box outside of Gotham. And out of the country... fuggedaboutit. I tried in vain to find them in Shanghai last year, and the closest I got was the Orion Pie. But it's just not even close.
The world should know the goodness of this treat.