Leavened bread is not eaten during the Jewish holiday, with the post prompting a barrage of criticism on social media.
One Twitter user responded: “Astonishing (but sadly unsurprising) basic religious illiteracy from @UKLabour.”
Another wrote: “Got to laugh. @ukLabour trying to [be] inclusive to Jews celebrating Passover. The one thing observant Jews specifically avoid at Passover is bread.”
And Hugo Rifkind, the newspaper columnist, replied simply: “It’s...it’s...it’s...a loaf of bread.”
The message, also featuring a Star of David and a goblet, read: “As Jewish people prepare for Passover, we’re wishing everyone in the Jewish community chag sameach [happy holiday].”
The mistake comes amid continuing tensions between Labour and Jewish groups, because of the antisemitism scandal that gripped the party.
In recent weeks, Labour is believed to have suspended four council candidates because of their behaviour, including one who posted Rothschild and Israel conspiracy theories online.
Labour later reposted the message without the images of the bread or goblet.
Theresa May also tweeted a Passover message in which she wished Jewish families “gathering around the seder table this evening a very happy and peaceful Pesach”.
“Today is a chance to celebrate the enormous and lasting contribution made by the Jewish community in the UK, in every walk of life,” she said.
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