It's common knowledge that George Harrison cribbed the lyrics from a Good News chocolate box he saw round at Eric Clapton's gaff one day. Clapton was still doing a lot of heroin at the time and, coming down, allegedly, he'd regularly eat an entire box of chocolates in one sitting. Even the Savoy Truffle.
Probably less well documented is how much of an influence on Harrison an EP put out by Lulu two years before the White Album was. The title track, Chocolate Ice (written by Mike Leander - Gary Glitter's scribe), bears more than a passing resemblance to Harrison's effort. Judge for yourself.
Lulu - Chocolate Ice (1966)
The Analogues - Savoy Truffle
For further listening, hear what David Hepworth and Mark Ellen think about them.