2. Burger King Kuro Burger
The Burger King Kuro Burger — which translates to Black Burger — was released in Japan in 2014. It features not only a jet-black bun but also black cheese and black sauce containing squid ink. The standard Kuro Pearl is a stripped down version, but you can step up to the Kuro Diamond that comes with onions, lettuce, and tomato. While it is certainly an eye-catching and intriguing idea, the taste has been compared to that of a microwaved salisbury steak.