Charcoal-roasted coffee is a kind of single product coffee classified in Japan, which refers to a kind of taste, almost no acid, strong scorching bitterness and sweetness, and belongs to a heavy taste. Authentic charcoal roasted coffee is generally roasted deeply with charcoal fire, with deep color, mellow taste and no sour taste. If you add condensed milk, it will taste.

Carbon roasted coffee, also known as bitter coffee, means that the fire source of roasted coffee is carbon fire, and sometimes special wood is used as fuel. Coffee beans roasted with charcoal fire will taste like wood, not like charcoal burning.

Coffee contains some nutrients. Nicotinic acid in coffee contains vitamins, and roasted coffee beans have higher content. But also free fatty acids, caffeine, tannic acid and so on.