Preheat barbecue Grill.
Using a sharp knife, make a slitalong most of the length of the unpeeled banana skin and almost through the bananas.
Push chocolate chips and marshmallows into the slits; push the banana skins closed. Wrap each banana tightly in aluminum foil.
Place the banana packets on the grill rack and cook for 10 minutes, turning the packets after 5 minutes. Remove from the grill. Carefully open the banana packets and remove the cooked bananas from the aluminum foil. NOTE: You can serve in the aluminum foil.
If desired, serve with either whipped cream or ice cream. Serve with a teaspoon, to scoop out the cooked banana flesh covered in melted chocolate.
Grilled Chocolate Banana Recipe: https://whatscookingamerica.net/Fruit/BananaChocGrilled.htm