marsh ‧ mal ‧ low /ˌmɑːʃˈmæləʊ $ ˈmɑːrʃmeloʊ/ BrE AmE noun [uncountable and countable]
[ Date: 1800-1900 ; Origin: marshmallow type of plant whose root contains a sweet substance once used in candy (11-21 centuries) , from Old English merscmealwe ]
a very soft light white or pink sweet, made of sugar and egg ↑ white