1. Preheat the oven to 350 degrees.

Peanut Butter Filling

1. In the bowl of your stand mixer, mix the peanut butter and powdered sugar together until smooth. Roll the filling into 1- inch balls. Makes about 24 balls. (mixture will be sticky). Place them on baking sheet lined with parchment or Silpat and chill in the freezer while you are making your cookie dough.

Cookies

1. Now in the mixer, mix the butter, peanut butter and brown sugar together for 2 minutes on medium speed until light and creamy. Scrape the sides of the bowl as necessary.

2. Add in the vanilla, egg and extra yolk, cocoa powder, salt, and baking soda. Mix on medium speed for one minute until smooth, scraping the sides of the bowl as necessary. Add the flour and mix on low speed until just combined.

3. Remove the peanut butter balls from the freezer. Scoop out a heaping tablespoon sized amount of the chocolate dough and form the dough around a peanut butter ball. Flatten the dough slightly so it’s not a round ball.

4. Dip each into the granulated sugar and place on baking sheet 2 inches apart. Bake for 8-9 minutes until cookies are set and slightly cracked. Transfer to a wire rack to cool completely.