Marshmallow

Marshmallows were a Terran confection consisting mostly of sugar and egg whites. They are used in many desserts, including Rocky Road ice cream. 

Traditionally, camping out includes toasting marshmallows over a campfire. After researching the USS Enterprise (NCC-1701-A)'s database, Spock brought a marshmallow, which he referred to as a "marshmelon", dispenser along for his shore leave in Yosemite National Park with Leonard McCoy and James T. Kirk. After consuming a marshmallow, it is traditional to then engage in a sing-along. 

Marshmallow