Preheat oven to 180 degrees. Line a brownie pan with parchment, grease and set aside.
Whisk together the dry ingredients and set aside.
Add in the eggs, sugar, vanilla and cookie batter spread into the melted butter, and whisk till smooth.
Add in the dry ingredients into the wet ingredients and fold in till moist. Fold in the chocolate chips.
Pour into the prepared pan and bake for 25 minutes.
Allow to cool in the pan for 15 minutes before transferring on to the rack to cool completely.
Slice into 12 to 16 pieces and serve.