Blackboard. Blackberry. Black widow. But a black burger? Yup. A dark-colored hamburger — that isn't burnt — is now being sold in Japan by fast-food giant Burger King. Called the Kuro Burger, it features a black bun, meat with black pepper, and black cheese. The bread and cheese contain bamboo charcoal, popular in Japanese cuisine. The sandwich also has an onion-and-garlic sauce made dark with squid ink. But don't be alarmed — squid ink is commonly used for cooking, food coloring, and flavoring. The other use is confined to the ocean.

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