Here's what you need:
- 1 1/2 cups flour
 - 1/2 cup unsweetened cocoa powder
 - 1/2 teaspoon baking soda
 - 1 stick melted butter
 - 1/2 cup granulated sugar
 - 1/2 cup brown sugar
 - 1 1/2 cup peanut butter
 - 1 egg
 - 2 tablespoons milk
 - 1 teaspoon vanilla
 - 3/4 cup powdered sugar
 
- Preheat oven to 350 degrees F. Set parchment paper on a baking tray, and set aside. In a medium sized mixing bowl stir the flour, cocoa powder, and baking soda.
 - With an electric mixer on medium, beat the butter, granulated sugar, brown sugar, and a 1/2 a cup peanut butter until smooth and creamy. Add the egg and beat well.
 - With mixer on low slowly add in the flour mixture alternating with the milk. Stir until combined
 - Roll the dough into balls about 1 1/2 inches. Place them onto the baking sheet, and slightly flatten them.
 - With an electric mixer, beat the remaining 3/4 cup peanut butter and powdered sugar together until firm. Roll into balls of about 3/4 inches.
 - Put each ball into the middle of the chocolate cookie, and wrap the chocolate dough around the peanut butter, making sure not to crush the peanut butter in the middle.
 - Bake for 8-15 minutes, or until a knife comes out clean when inserted into the middle of the cookie.
 
