Burger King announces new Whopper with black bun, baked with A.1. sauce

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The Burger King whopper is getting a Halloween make-over.

Including a new black bun baked with A.1. steak sauce.

Burger King announced the new burger on its Twitter page, saying "something wicked is coming."

It's also coming with a few more calories and higher fat count than the regular whopper.

Burger King has already sold burgers with black and red buns in Japan.