Chocolate Peanut Butter Surprise Cookies

1 1/2 cups all-purpose flour
1/2 cup unsweetened cocoa
1/2 tsp baking soda
1/4 tsp salt
1/2 cup granulated sugar (plus more for rolling)
1/2 cup packed brown sugar
1/2 cup unsalted butter, softened
1 cup creamy peanut butter, divided
1 tsp vanilla extract
1 egg
3/4 cup powdered sugar

1.  Preheat oven to 375 degrees.  Line a baking sheet with parchment paper & set aside.
2.  In a medium bowl, whisk together flour, cocoa, baking soda and salt.  Set aside.
3.  Beat together sugars, butter, and 1/4 cup of peanut butter until light & fluffy.  Add the vanilla and egg, beating to combine.  Stir in the flour mixture and stir to combine, blending well.  Set aside.
4.  In a medium bowl, mix together powdered sugar & remaining 3/4 cup of peanut butter until smooth.
5.  Pull off a heaping tablespoon of cookie dough & flatten with your hands.  Take about 1 teaspoon of peanut butter mixture & place it in the center of the dough.  Wrap the dough around the peanut butter center, pressing to seal.  Roll the cookie into a ball and roll in sugar.  Place cookies on  prepared baking sheet 2" apart.  Using the bottom of a glass, flatten each cookie to about 1/2" thickness.
6.  Bake in preheated oven for 7-9 minutes.  Let stand on baking sheet for 2 minutes, then remove to a wire cooling rack.

Recipe source:  http://bigflavors.blogspot.com/2010/12/supper-club-chocolate-peanut-butter.html