Preheat oven to 350 degrees.
Spray a 9 x 13 pan with cooking spray.
Melt the butter in the microwave.
Add the brownie mix and mix to incorporate.
Add one egg, water and pecan pieces.
Stir to combine.
Pour into the prepared pan.
Beat the softened cream cheese, vanilla and remaining eggs in a large bowl until well combined.
Gradually beat in the powdered sugar, one cup at a time, until well incorporated.
Stir in the chocolate chips.
When the mixture is smooth, pour over the brownie mixture.
Bake for 40-45 minutes or until the top is medium brown and a thin crust forms on top.
When removed from the oven, dust with sifted cocoa powder.
Cool completely before cutting.