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1
To make the cookies: Heat the oven to 350u00b0F
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2
Line two baking sheets with parchment. In a medium bowl, sift together the two flours, baking soda and salt.
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3
In the bowl of an electric mixer, cream the butter, peanut butter and sugars with the paddle attachment until light and fluffy. Add the vanilla and egg; continue creaming until smooth and fluffy, about 3 minutes with an electric mixer (longer by hand). Stir in the flour mixture by hand just until it's incorporated; don't over mix or the cookies will be tough. Drop heaping tablespoonfuls of batter, spaced about 2-inches apart, onto the lined baking sheets. With floured fingers, flatten each dab of batter into a 2-inch round.
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4
Bake until the cookies are puffed and golden, 12- 14 minutes, rotating the baking sheets if needed for even baking. Transfer the cookies to a rack to cool.
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5
While the cookies cool, make the filling: In a small bowl, cream the confectioners' sugar, butter and peanut butter until smooth. Add the heavy cream; continue creaming until smooth and fluffy. Stir in the chopped peanuts and chocolate.
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6
To assemble: Transfer the cooled cookies to a work surface, flipping half of them over. With an offset spatula or a butter knife, spread a scant teaspoon of filling onto each turned-over cookie. Set another wafer on top of each filled cookie, pressing gently to spread the filling. Store sealed at room temperature or in the refrigerator.
