marron glacé UK /ˌmaɹɒ̃ ˈɡlaseɪ/US /məˌɹɑn ɡləˈseɪ/ noun2 •A chestnut preserved in sugar or syrup and flavoured with vanilla.MARRON SANDWICH: Cut the bread in rounds with a biscuit cutter; put a marron glace in the center and around it whipped cream that has sweetened and flavored. Nice for afternoon luncheon. — 1909 •The colour of such a chestnut; a light brown.Eyeshadow in Marron Glacé; Eye Liner in Dusky Brown. — 1994 formsmarrons glacés