01 -  Set the broiler on high or preheat the grill to medium heat. 
 02 -  Arrange 8 graham cracker squares on a tray and place 1 square of chocolate on 4 of the crackers. 
 03 -  Top each chocolate square with a large marshmallow. 
 04 -  Toast the marshmallows under the broiler for 1 to 2 minutes, or over the grill, until golden and softened. Monitor closely to prevent scorching. 
 05 -  Lay 2 to 3 apple slices onto each toasted marshmallow. 
 06 -  Drizzle 1 tablespoon caramel sauce over the apples on each stack. Dust with ground cinnamon if desired. 
 07 -  Cover each stack with the remaining graham crackers, pressing gently to form sandwiches. Serve immediately while warm and gooey.