A great way to get the summer taste of S'mores without the firepit.
Preheat the oven to 325°
In a medium bowl, combine the melted butter, graham crackers, sugar and salt. It will look like sand.
Pour the graham cracker mixture into a greased 8x8 baking pan. Press the mixture flat with your hands. Be sure to get it in an even layer. Bake for 15 minutes.
Meanwhile, make brownie mixture, according the box directions.
Once the graham cracker crust is baked, remove from oven and pour brownie mixture on top of crust. Bake for an additional 35 minutes or longer if your brownie mix calls for it. You want the brownie to be cooked through. Stick a toothpick in the middle and if it comes out clean the brownies are done.
When ready to serve, place a layer of marshmallows on top of brownie layer. Place in the oven with the broiler on. Allow the marshmallows to brown-be very careful this happens very quickly!
Cut into squares or triangles and serve.