The secret Jewish history of those kosher fruit-jelly slices

2026-05-15 · source · source ↗ · wiki page

David Zvi Kalman, scholar in residence at the Shalom Hartman Institute and senior adviser at Sinai and Synapses, blogs at jellomenorah.com.

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The piece opens with the author comparing the Passover aisle to the Apollo 13 scene where engineers must solve a puzzle with limited parts. Passover forces food scientists to "recreate standard American packaged foods" using a thin set of permitted ingredients.

While most Passover aisle products are mediocre, the exceptions are "the Passover candies: the bars of dark chocolate, the tins of almond kisses, the macaroons, the peppermint patties." These thrive because "both sugar and chocolate are perfectly kosher" for Passover.

History of Sugar and Fruit Jellies

The fruit jelly slice was an American product invented between the world wars, claimed by both Winnipeg, Manitoba, and Boston. Its shape, like the McDonald's McRib, "pays homage to something that it is not" — specifically, candied fruit.

Sugar has been cultivated for 8,000 years but was so labor-intensive to refine that "creating it without government support was next to impossible." The first candies were candied fruit — "just take a piece of fruit, soak it in sugar and wait until all the juice has been absorbed." Some Moroccan Jews still eat candied eggplants and oranges for Passover; Armenians eat candied almonds.

Extracts allowed candy to take any form, leading to elaborate sugar sculptures in Europe from the 15th century. However, boiling sugar was tricky — a difference of just a few degrees Celsius separates jelly from toffee. Thermometers, perfected only in the 18th century, allowed scaling.

By the end of the 19th century, American children could buy "jelly beans, candy corn, licorice, toffee and marshmallows" as penny candy. The pre-WWII era saw an explosion of branded varieties: Jujubes, Jujyfruits, Mounds, Almond Joy, Chuckles, and more.

Why the Jelly Slice Survived

The fruit jelly slice "is too delicate for easy transportation" and should have vanished from mass markets. What saved it is agar-agar, a seaweed-derived gelling agent — which happens to be kosher for Passover since seaweed is permissible.

Much of the Ashkenazi Passover diet uses ingredients the ancient rabbis "either rarely ate (sugar, seaweed), had never heard of (coffee), or were cultivated in places that the rabbis didn't know existed (potatoes, chocolate and quinoa)." The jelly slice's success represents a moment when "Jewish legal interests and American industry accidentally collided."

He concludes: "Tradition is quirky; the bigger our universe, the quirkier it gets. The best we can do it enjoy its fruits."

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