Is Roasting A Marshmallow Conduction Or Radiation?

Is Roasting A Marshmallow Conduction Or Radiation? Burnt marshmallow is simply a marshmallow that has been extremely toasted! There are two main processes that heat a marshmallow: absorption of campfire radiation (photons) and contact with very hot air rising off the fire (convection). If we place the marshmallow directly above the fire, we get both.