Peanut Butter Filled Chocolate Cookies Recipe

1 1/2 cups flour
1/2 cup special dark cocoa powder
1/2 teaspoon baking soda
1/2 cup butter, softened
1/2 cup granulated sugar
1/2 cup packed light brown sugar
1/4 cup chunky peanut butter
1 egg
1 tablespoon milk
1 teaspoon vanilla
Peanut Butter Filling
3/4 cup sifted confectioners' sugar
1/2 cup chunky peanut butter
2 tablespoons granulated sugar
Preheat oven to 350° F.
Sift together the flour, special dark cocoa powder and baking soda in a medium bowl.
In a large bowl cream together the butter, 1/2 cup granulated sugar, brown sugar and 1/4 cup of chunky peanut butter until well combined. Add in the egg, milk and vanilla. Beat well. Gently mixing in the flour mixture about 1/3 at a time until fully incorporated. Form the chocolate dough into 32 balls.
For the filling, combine the confectioners sugar and 1/2 cup peanut butter in a mixing bowl and beat until smooth. Form peanut butter filling into 32 balls.
Working on parchment paper surface, gently flatten each chocolate ball and make an indentation in the center for each peanut butter ball to set in. Carefully fold the chocolate cookie dough around the peanut butter ball and seal the edges. Roll dough into a ball.
Place balls on a parchment lined baking sheet. Lightly flatten with the bottom of a glass dipped in 2 tablespoons granulated sugar.
Bake cookies for about 8 minutes or until the surface begins to slightly crack. Let cool for 1 minute on the sheet. Transfer to wire racks and cool completely.