Which Lennon single was recorded and released within ten days in January 1970?

The Lennon single recorded and released within ten days in January 1970 was “Instant Karma!”

Lennon conceived the song on January 27, 1970, after discussing the idea of immediate cause and effect with Yoko Ono’s former husband, Tony Cox, and Cox’s partner, Melinde Kendall. He wrote the song at home in about an hour, then urgently contacted George Harrison and producer Phil Spector to arrange a recording session.

That evening, Lennon recorded the basic track at EMI Studios in London with Harrison, Klaus Voormann, Alan White, and Billy Preston. Spector produced the session, giving the performance a dense, echo-rich sound often associated with his Wall of Sound approach. Lennon later described the remarkable schedule with the memorable summary that he wrote it for breakfast and recorded it for lunch.

Apple Records released the single in Britain on February 6, 1970—ten days after the recording and composition date. It was credited to Lennon/Ono with the Plastic Ono Band in the UK and to John Ono Lennon in the United States. “Cold Turkey” was an earlier Lennon single, while “Mind Games” and “Power to the People” came later.