Euphoria Morning is the first solo studio album released by American musician Chris Cornell. It was released on September 21, 1999 through Interscope Records. Euphoria Morning sold over 75,000 copies in its first week of release and eventually sold 343,000 copies in the U.S. alone. While a large success critically, it did not sell nearly as well as Cornell's albums with Soundgarden. It is Cornell's only album between the split of Soundgarden until he joined members of Rage Against the Machine in forming Audioslave. The original working title of this album was to be "Euphoria Mourning" however, a typo changed the album name to "Euphoria Morning". This was confirmed by Chris Cornell at his Philadelphia show on the Songbook Tour.
In 1998, Cornell began working on material for a solo album on which he collaborated with Alain Johannes and Natasha Shneider of the band Eleven. "Flutter Girl" was an outtake from Superunknown, the 1994 Soundgarden album. During his 2007 solo tour, Cornell stated that "Wave Goodbye" was written as a tribute to Jeff Buckley, who drowned in 1997.
According to Allmusic's Euphoria Morning is " a shaded, textured rock album," lacking the "grinding sludge and furious rock" of Soundgarden. Nevertheless, the album was described to be of a piece with Soundgarden's psychedelic-indebted 1994 album Superunknown and delves back into ’60s psychedelic melodies and acoustic ditties."