Thread the marshmallows on skewers and toast to a bit past golden brown so they start to darken a bit. Set aside.
To the blender, add the milk, vanilla ice cream, frozen banana, 11 of the toasted marshmallows. Blend until almost smooth. Then add 4 of the graham squares, slightly crumbled, 2 of the tbsps of chocolate sauce and the pinch of salt. Blend until completely smooth.
Then pour the shake into glasses, swirl the rest of the chocolate sauce on top, crumble up the rest of the graham crackers on top, and add a toasted marshmallow and Hershey's chocolate piece to each glass. Enjoy!