Burger King New Cheese Burger Is Black

Burger King Japan has recently release a cheeseburger where the buns and cheese are of the color black.  Apparently this was achieved by using bamboo charcoal.  

Black Burger from Burger King Japan Comparison

The sauces are made with squid ink to give it a dark brownish color.  Looking at the burger, the only colors are from the lettuce and tomatoes.  These burgers are available in Japan for a limited time.

source: Burger King Japan Facebook, Kotaku