The Charcoal burner (Russula cyanoxantha) belongs to the family Russulaceae. It is a mushroom that is widely distributed throughout Japan and the Northern Hemisphere. It is found on the forest floor in beech and birch forests from summer to fall. The caps are 6 to 10 cm in diameter, and are round to flattened, with a slightly funnel-shaped depression. The surface is smooth and varies in color from purple, light red, blue, green, and olive. The stipe is white and cylindrical.