In Brochos Perek 6, Mishna 6 the Mugmar is mentioned in the context of who makes the Brocha for it. Commentaries explain that it is some sort of incense that was smelled after a meal.
It would seem that this custom has been lost to the ages. Does anyone know if it is done anywhere today in the Jewish world? Maybe some Sefardim still perform this custom? And if it has indeed disappeared, does anyone know why?