This recipe uses two boxed brownie mixes. Please follow the ingredients and cooking instructions on the boxed mixes.
Follow the instructions on the brownie boxes adding the nuts if desired and bake accordingly in a 9 x 13 pan that has been sprayed with nonstick cooking spray.
When the brownies are barely done, remove from oven and sprinkle the marshmallows evenly over the top.
Return the brownies to the oven and cook approximately 10 minutes checking often for doneness.
When the marshmallows are lightly browned, remove them from the oven.
Place the Nutella in the microwave for 30 seconds or more until it gets thin enough to drizzle over the marshmallows.
Crumble the graham crackers and sprinkle over the Nutella.