"Mad Hatter" is a song by American heavy metal band Avenged Sevenfold, released as the lead single from the EP Black Reign on September 17, 2018.

"[4] The song was recorded in March 2018 in Los Angeles and produced once again by Joe Barresi, before Shadows formed nodes on his vocal chords and couldn't sing for at least a few months.

With Shadows being an avid gamer he was excited about the release being a brand new experience and wanting to write something completely new direction-wise.

When asked about the direction of the song he said "We felt that we should take a similar leap with the music and go for something bigger, darker and more cerebral....Watching the initial trailers and looking at production sketches reminded me of the 'S-Town' podcast and its main protagonist, John B. McLemore.

[12][13][14] M Shadows continued: "I'd put this in the "we fucked up" category," "Mixing and mastering happened while we were in Europe and we were getting stuff sent over and all listening on different headphones.