Preheat oven to 400 F.
Cut pastry sheets on the fold. Cut each sheet in half.
Place chocolate & marshmallows on one half of pastry sheet.
Place other half of pastry sheet over the half with filling & press to close the edges. Press down on the edges with a fork to create ridges & secure the sides.
Bake for 12-14 minutes or until flakey & golden brown.
Top with more chocolate, graham crackers, & marshmallows. Enjoy!