Preheat your grill to medium heat.
In a mixing bowl, whisk together the flour, baking soda, and salt.
In another bowl, cream together the softened butter, brown sugar, granulated sugar, and vanilla extract until smooth.
Add the egg and mix until well combined.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Fold in the chocolate chips and chopped bacon.
Using a spoon, drop large spoonfuls of the cookie dough onto a piece of aluminum foil, shaping them into round cookies, leaving space between each cookie.
Fold the foil to create a sealed packet.
Place the foil packet on the grill and cook for about 10-12 minutes, or until the cookies are golden brown.
While the cookies are grilling, roast the marshmallows over the grill until they are golden and gooey.
To assemble, place a grilled cookie on a graham cracker half, top with a roasted marshmallow, and finish with another graham cracker half.
Serve warm.