In a bowl, combine the graham cracker crumbs, sugar and melted butter.

Press into the bottom and sided of a 10 inch tart pan with removable bottom

bake in a preheated 350 oven for 10-12 minutes.

Meanwhile, in a double boiler over medium heat, melt the chocolate chips with the cream until smooth.

Pour into cooled tart shell.

Top with marshmallows and place under broiler for 15-30 seconds. WATCH CAREFULLY!

Place in the fridge for the ganache to set, at least 4 hours, preferably, overnight.