Yeah, I used a boxed brownie mix. Easier that way, and just as good as home made stuff. Plus extra chocolatey goodness.
We have some milk chocolate chips but I needed those for something else so I used the peanutbutter flavored ones instead. Still really great though ^^
Then go ahead and make your pair of batters. For the brownies, just follow the box instructions - usually 2-3 eggs, some water and some oil.
For the cookies start by creaming together the butter, brown sugar and regular sugar. Add in the egg and vanilla. In a separate bowl mix the cornstarch, baking soda, baking powder, salt and flour then add them to the other mix until it's well mixed and add the chips in last.
Then slice, eat, and enjoy! I know I'll have to be containing myself to a slice a day because otherwise I will probably eat all of this at once, but to me that's just a sign of how good it is :D
Banner was made by me in Photoshop. All other pictures here were taken by me specifically for this post. I have been a home cook for over a decade, and any questions or comments about this recipe are encouraged!