Start by making candied bacon. Preheat your oven to 350°F and place a rack in the center of the oven. Combine light brown sugar and 1/8 teaspoon cinnamon on a plate, using your hands to mix. Rub each slice of bacon with cinnamon sugar until evenly coated. Lay strips of bacon on a cooling rack set over a baking sheet. Bake for 30 to 35 minutes until deeply caramelized. Let cool then finely chop. Measure out 1/2 cup (1 1/2 oz.) for the marshmallows and set aside. Save remainder for snacking.
Lightly coat a 8 by 8 inch baking pan with cooking spray. Use a paper towel to wipe away any excess spray.
Combine gelatin and cold water in a small bowl, whisking to combine. Let stand for at least 5 minutes.
In a medium saucepan, combine white sugar, maple syrup, corn syrup, water and sea salt, stirring to combine. Bring to a boil over high heat, stirring occasionally. Continue to boil until the mixture reaches 240°F. If the mixture starts to bubble up too much, lower the heat. Once the mixture reaches 240°F, take it off the heat.
Microwave the gelatin on high for 30 seconds. Pour into the bowl of a stand mixer fitted with the whisk attachment. Whisk on low for a moment then slowly pour in the hot syrup mixture. Increase the speed to medium (number six on my mixer) and beat for 5 minutes. Increase the speed to medium-high (number eight) and beat for 3 minutes. Add 1/8 teaspoon cinnamon then beat on the highest speed possible (number ten) for 1 minute.
Using a silicon spatula, quickly fold in the candied bacon bits. Pour the marshmallow into the prepared pan and smooth out the top. In a small bowl, combine confectioner's sugar and corn starch, whisking to combine. Sift a few spoonfuls of the sugar-starch mixture evenly over the marshmallow. Set aside the rest of the sugar-starch mixture to use once the marshmallows are cut.
Let the marshmallow set for at least 6 hours in a cool, dry place. Run a sharp knife along the edges of the pan to release the marshmallow. Invert onto a cutting board. Use a cookie cutter to cut out shapes from the slab (I used a 2 1/2 inch round) or use a sharp knife to cut the slab into even pieces. Finish by dusting each piece with the sugar-starch mixture. I found the easiest way to do this was to put the cut marshmallows in a medium mesh basket strainer (see picture above) set over the bowl containing the sugar-starch mixture. Sprinkle with the pieces with the mixture then use your hands to toss. Repeated until marshmallows are evenly coated.
To serve, roast marshmallows over an open flame or carefully caramelize with a blow torch. Top with a piece of bittersweet chocolate then sandwich between two graham crackers.