Ingredient · Ingredients
Quince
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A hard, high-pectin pome that, if not overripe, Ohio State treats as able to gel with sugar alone — and a Group II fruit in U.S. jam identity.
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Quince is a hard pome you rarely eat raw. Ohio State places quinces in Group I: if not overripe, enough natural pectin and acid to gel with added sugar only 1. That is why quince jelly is a classic set. Hard fruits such as apples may need 20–25 minutes to soften for juice; excess boiling destroys pectin, flavor, and color 1. Apple is the neighbor extraction problem. See Jelly and Pectin.
Jam identity. 21 CFR 150.160 lists quince in Group II 2. Kitchen pectin class and labeling ratio are different tables.
What to notice. Perfume when cooked, astringency when raw, a paste that sheets. Do not invent a water-bath time. Jam if you keep the pulp in the pot.
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- quinces
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Cited in this article
- Jams, Jellies, and Other Fruit Spreads (HYG-5350) — Treva Williams. Ohio State University Extension. 2015 — Culinary definitions of jam, jelly, preserves, marmalade; pectin/acid/sugar roles; sheet, temperature, and plate tests for doneness. Cites USDA Complete Guide and NCHFP.
- 21 CFR § 150.160 — Fruit preserves and jams — U.S. Food and Drug Administration (text via Cornell LII) — U.S. standard of identity. Group I fruit-to-sugar 47:55; other cases 45:55; finished soluble solids not less than 65 percent. Kitchen usage and this labeling standard are not the same thing.
Updated 2026-08-26. gg:ingredient:quince · CC BY 4.0
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Gourmet Gastronomer. "Quince." Gourmet Gastronomer. Updated August 26, 2026. https://gourmetgastronomer.com/ingredients/quince/.
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