The Fettecke (German for "fat corner") was a work of art by German artist Joseph Beuys, who, on several occasions, placed several kilograms of butter in the corners of rooms in museums.

He constructed a Fettecke in 1982 in a atelier room in the Art Academy in Düsseldorf. This particular installation achieved special publicity when the custodian of the Academy accidentally cleaned it up in 1986, nine months after Beys' death. Another artist discovered the remains in a trash can, and took ownership of it.

In 2014, an artist duo took the remains, distilled it, made a strong liquor from it, and tasted it. Allegedly, it tasted of parmesan cheese. The bottle of liquor itself was then exhibited.