Prepare the brownie mix as directed, adding in 1/2 cup of Peanut Butter. Make sure all ingredients are mixed in well
Bake as directed
Allow to cool for 5 minutes, remove from pan and cool completely.
Ice the top of the brownies if desired (but really who doesn't love icing)
Place 2 Tbsp of Peanut butter in a sandwich bag and microwave for 5 second intervals until melted.
Cut the tip of the corner of the bag and drizzle the melted peanut butter on top.
Allow to cool, cut into squares and enjoy!