This peanut butter sandwich cookie is a smaller version of the gargantuan homemade Nutter Butters served at Bouchon Bakery, Thomas Keller's restaurant in the Time Warner Center. It is pure peanut sophistication; two crunchy, crisp peanut butter cookies filled with pillowy peanut-butter frosting. These cookies spread a fair amount while baking, so be sure to give them plenty of room on the baking sheet and let them cool and firm up before filling. (After reading through some of the reader…
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