Toasted Bincho Dust Marshmallows

I have never really understood shop-bought marshmallows; I find them stale and boring. But I have had a lot of fun playing around with homemade versions, and with my children I have been through a full repertoire of recipes and flavours. For the binchotan theme I am adding the contents of activated charcoal capsules, available from healthfood stores. Other great Japanese-inspired flavours include candied yuzu and matcha with vanilla.