The News Minute | September 11, 2014 | 03:50 pm IST Burger King in Japan is taking the humble burger to an entire new level. They have come up with black burger- quite literally. The Kuro Diamond and Kuro Pearl burgers use black cheese, black garlic sauce, and a black bun too. According to Bored Panda, 'the bun and the cheese are colored by bamboo charcoal, while the garlic sauce is colored with squid ink'. ( All images source: Burger King )Post by BURGER KING JAPAN ／バーガーキング・ジャパン.