If you ever thought to yourself "this burger bun and cheese combo just isn't metal enough for me," Burger King Japan has you covered.

Black cheese. Seriously. Black cheese. That's not a band that does death metal covers of sitcom theme songs, it's a very real thing.

According to Kotaku,

"Kuro Burger" ("Black Burger"), with buns made from bamboo charcoal, an onion and garlic sauce made with squid ink, beef patties made with black pepper, and black cheese, which is also apparently made with bamboo charcoal.