Mix cookie mix with egg, water and oil per package directions.
Mix in one half bag of peanut butter chips.
Press cookie dough down into a foil lined, sprayed 9 X13 pan.
In a separate bowl, mix the condensed milk and peanut butter together until smooth.
Spread over the unbaked dough evenly.
Bake at 350 for 22-25 minute, or until the top is no longer wobbly.
Remove from the oven and immediately top with mixture of remaining peanut butter chips and white chips.
Allow to cool completely before cutting.