Burger King's new "Halloween Whopper" features a pitch black hamburger bun coated with rich steak sauce.

This is similar to Burger King Japan's Kuro (translated "black"), where the buns are made of squid ink and smoked in bamboo charcoal. The Kuro, which has already elicited both positive and negative reception from customers, also features black cheese and black sauce.

A Reddit user, possibly an employee, posted leaked photos of the classic restaurant whopper with black hamburger buns. The images from the franchise's training website were leaked in early September 2015.

Turns out the photos weren't just rumors as Burger King has announced that starting Sept. 28, the Halloween Whopper will be available in all U.S. stores.

Pushing their luck with the hue-oriented sandwiches, Burger King Japan has recently decided to release red hamburger buns dubbed the Aka Samurai Beef and Aka Samurai Chicken ("aka" translated "red").

"Our U.S. guests have been extremely curious about the bun flavors they've seen introduced in Japan and other countries, so we saw the opportunity to bring them an equally unique experience ... It may look Japanese but it tastes like America," stated Burger King North America Chief Marketing Officer Eric Hirschhorn.

Ever since the Reddit posting of the leaked black hambuger bun photos, customers have been curious as to the whopper's recipe and presentation. Burger King has kept mum on such inquiries. However, a new release reported that the Halloween Whopper buns, will be baked with A.1. sauce and will be layered with "savory flame-grilled beef topped with melted American cheese, ripe tomatoes, fresh lettuce, creamy mayonnaise, A.1.® Thick and Hearty Sauce, crunchy pickles and sliced white onions."

While the Japanese Kuro features black cheese, the U.S. Halloween Whopper uses yellow American. The sauce is baked into the bun itself, and the burger will be served with the rest of the regular Whopper fixings.

Whether this new sandwich is scary-good or scary-bad, we shall find out.

The Halloween Whopper, with a suggested retail price of $4.99, is available for a limited time only.

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