Start by filling the bottom of each cone with mini marshmallows, about 1⁄4 to 1⁄3 full.
Next, layer in the chocolate chips, broken graham crackers, and more mini marshmallows until the cone is filled to the top. Pack the layers down gently, as they will shrink while cooking.
Wrap each cone in aluminum foil so that they are tightly sealed. Be sure to cover the top of the cone first to prevent any delicious filling from spilling out. Then, fold the bottom and wrap up the sides.
If you’re using the oven, preheat it to 350°F. Place the wrapped cones on a baking sheet and bake for about 10-15 minutes or until everything is nice and gooey.
For a more rustic experience, cook them over a campfire or grill. Place the wrapped cones over hot coals or grill grates and cook for 5-7 minutes, turning them occasionally. You’ll know they’re ready when the fillings melt and the cone is slightly toasted.
Carefully remove the cones from the heat and allow them to cool for a minute or two.
Unwrap the foil, and voilà! Enjoy your warm, delicious treat!