Preheat oven to 350 degrees F.
Line two cookie sheets with parchment paper. Set aside.
In a large bowl mix together the flour, baking powder and salt.
In a stand mixer combine the butter with the sugars and dry brownie mix. Cream until smooth.
Add the vanilla extract, and egg. Mix again until combined.
Add the dry ingredients slowly to the mixer while it's on low speed, mix until combined.
Turn mixer off, and remove the bowl.
Add the chocolate chips and chocolate pieces to the bowl, mix with a spoon just enough to have them mixed in the batter evenly.
Spoon or use your hands to place each mound on the cookie sheets. For these cookies I like to make round balls. I don't like to flatten these cookies.
Place the first batch in the oven on the middle rack, bake for about 8 to 10 minutes, spin the pan halfway through the cooking time. If you make them larger you can increase time to 12 minutes.
Remove from oven.
Place next batch in oven and bake for the same amount of time.
Allow each batch to cool for about 5 minutes on the cookie sheet.
Transfer to a wire rack and allow to cool completely.
Serve with a big old chocolate loving smile!