Buttermilk whey sweetened with honey, or an infusion of marshmallow roots, ought to constitute the whole of the patient's drink.
That night, in front of the tents, there was a marshmallow roast.
His face has about as much color left in it as a marshmallow.
Tea made from the marshmallow has also been recommended for this purpose.
Oh, some had butter scotch, some had gravy, ...