A confection with an exotic past.
The marshmallow gets its name from the mallow plant that grows in marshes.
In ancient times, sap from the root of that plant was used to make medicinal syrup and ointment. Eventually, that same sap became a source of candy.
Today's supermarket marshmallow is untouched by root sap. It's made from corn syrup, gelatin, egg whites, and sugar.