Whisk the graham cracker crumbs and granulated sugar together. Pour in the melted butter and whisk to combine.
Make the crust
Bake crust at 350F for 10 minutes. While crust is baking prepare brownies.
Bake the crust
Use the brownie recipe or use your favorite box mix.
Make the brownie batter
When brownies are just baked sprinkle on chocolate pieces and cover the whole pan in mini marshmallows.
Turn the broiler on low and place the brownies under the heat. Watch carefully so they do not burn.
Toast the marshmallow
Slice and Enjoy!