Line 8x8 baking dish with parchment & set aside
Melt your chocolate in double boiler until it's smooth & silky
Remove from heat - allow to cool 1-2 minutes
Add marshmallows & 1/2 the graham crackers - stir to coat
*Note- work quickly -the marshmallows will start to melt in the warm chocolate.
Transfer to prepared pan - smooth out
Top with additional graham cracker crumbs & extra marshmallows if desired
Place in freezer to firm up the chocolate quickly- leave for 20 minutes
Remove & cut into squares - serve.