Photo: J Muckle/Studio D

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I'd Never Even Heard of a Black-and-White Cookie...
until I started working in New York 12 years ago. Now my favorites are from William Greenberg Desserts, on Madison Avenue; they're always moist and taste like cake, and you can even customize your colors if black-and-white is too boring for you. Greenberg's cookies come in two sizes: ginormous and sensible. You can guess which one I usually go for...