Cream together the butter and sugars in a mixer. Add the eggs and vanilla, making sure to scrape down the sides of the mixing bowl. Add the flour, salt, baking soda and baking powder and mix on low until everything is incorporated. Fold in the chocolate chips. Set dough aside.
Pre-heat the oven to 350 degrees.
Line the bottom of a 9x9 baking pan with tin foil and then spray the tin foil with a layer of baking spray.
Layer the cookie dough on the bottom of a 9x9 baking pan, pressing down to form the bottom of the slutty brownies.
Layer as many oreos that will fit on top of the cookie dough. No need to overlap. One single layer will do.
Pour the brownie batter on top of the oreo layer and make sure it's evenly layers on top.
Bake for 30-35 minutes. Test with a knife to see if the center is done. If the knife comes out clean, remove the brownies from the oven and pile on the marshmallows. If the knife comes out with batter still on it, allow the brownies to bake about 5 minutes more and then add the marshmallows. Let the brownies and marshmallows rest for 30 minutes so the marshmallows stick to the top layer. Using a blow torch, torch the top of the marshmallows until toasted. Cut and serve as needed.
**The cut best when the brownies are cold**