The so called Cannibal Restaurant is most probably just a hoax. However its prominent campaign has triggered outrage and disgust.
From the Guardian:
In a prominent advertising campaign on the internet, in German newspapers and on television, the restaurant, Flime, is appealing for willing donors and diners to become members of what it hints at being a new dining movement.
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"Members declare themselves willing to donate any part of their body," the advertisement reads, adding that any resulting hospital costs will be taken on by the restaurant. They say they are also looking to employ an "open-minded surgeon".
You can download the membership declaration from the restaurant's website.
The location of the restaurant – if it exists – is being kept a secret, as is the identity of the owners and investors behind it. As a foretaste of its menu, Flime is suggesting traditional Brazilian dishes such as bolinho, which it describes as "fried tatar balls with a sweet-sour dip", or feijoada, a main course consisting of "various pieces of meat with black beans and rice". It does not specify what type of meat is used.
The restaurant's menu is mostly modern Brazilian cuisine with some additions. The Amazon Wari' tribe is cited as an inspiration. The tribe used to practice mortuary cannibalism.