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["MAKE THE FILLING: In a small bowl, cream together the peanut butter and powdered sugar until smooth; roll the mixture into 30 3/4"" balls.", "Cover and refrigerate for 30 minutes.", "Meanwhile, MAKE THE COOKIE DOUGH: In a large mixing bowl, cream together the butter and peanut butter until smooth.", "Add both sugars; blend well.", "Blend in the egg white and vanilla.", "Combine the flour, cocoa powder, and baking soda; gradually add to the creamed mixture, stirring just until combined.", "Shape the dough into 30 1-1/2"" balls.", "Using floured hands, flatten each cookie and shape each one around a peanut butter ball, sealing the edges.", "Place cookies 2"" apart on ungreased cookie sheets; flatten with the bottom of a glass that has been dipped in sugar.", "Bake at 375F.", "for 7-9 minutes, or until the cookies are just set and the tops are cracked.", "Cool for 1 minute on the cookie sheets before transfering the cookies to wire racks; cool completely.", "MAKE THE ICING: In a small bowl, cream together the butter and powdered sugar; beat in the vanilla and enough milk to reach desired spreading consistency.", "Spoon the icing into a zip-lock bag with the corner snipped off.", "Pipe the icing over the cookies in a zig-zag pattern."]
