While the brownies are baking, combine everything except the chocolate chips. Mix well.
Stir in chocolate chips until you have a dough. Set aside.
When the brownies are done, let cool for approximately 10 minutes. You want them to still be warm in order to “spread” the dough topping.
Plop spoonfuls of chocolate chip cookie dough all over the top of the warm brownies and let set for a minute or so.
Then gently “spread” the cookie dough topping all over the brownies like frosting, making a two-tone layer.
Let it cool down and then put into the refrigerator to set up. Chill for at least an hour before cutting. If leaving in the frig overnight, then you will need to let it come to room temperature a bit before trying to cut the treats.