ounce plums

ProduceOunce plums typically ripen mid to late summer, from July through September in the Northern Hemisphere, with peak availability in August. Regional variations depend on climate and latitude, with longer seasons in warmer regions.

Rich in vitamin C, dietary fiber, and antioxidants including polyphenols, which contribute to their antioxidant properties. Ounce plums are also a good source of potassium and contain compounds with potential anti-inflammatory benefits.

About

Ounce plums, also known as greengage plums or Reine Claude plums, are small to medium-sized stone fruits belonging to the Prunus domestica species, believed to have originated in the Caucasus region. These plums are characterized by their distinctive pale green or golden-green skin, sometimes with darker spots or russeting, and translucent, amber-colored flesh that is remarkably sweet and juicy. The fruit contains a single large, flattened pit and is prized for its complex flavor profile—simultaneously honeyed, floral, and subtly tart—that develops as the plum ripens to full sweetness.

The variety name "ounce" historically refers to the fruit's modest size and weight, distinguishing it from larger plum cultivars. Ounce plums are particularly suited to cooler climates and are celebrated in European cuisines, especially French cooking, where the greengage has held esteemed status since its introduction by Sir Thomas Gage in the 18th century.

Culinary Uses

Ounce plums are valued both as fresh fruit and in preserves, compotes, and pastry applications. Their concentrated sweetness and delicate flavor make them ideal for jams, jellies, and tarts, where they require minimal added sugar. In European cuisine, particularly French patisserie, they are featured in clafoutis, tarte tatin, and upside-down cakes. The fruit pairs exceptionally well with almonds, vanilla, and cinnamon, and is often preserved whole or in halves due to their small, manageable size.

The plums may also be poached in light syrup, served as a garnish for game dishes, or incorporated into fruit sauces and coulis. Their refined flavor profile suits both sweet and savory applications, and they are traditionally paired with pork and duck in European cuisine. Fresh consumption is common when fully ripe, as the fruit's delicate nature makes handling more suitable for immediate use rather than long-distance transport.

Forms & Preparations

Fresh whole — Ripe fruit consumed directly or halved and pitted for use in fresh fruit salads, platters, and simple preparations.
Preserved/Jam — Cooked with sugar and pectin into a thick spread, often made with minimal added sugar due to the fruit's natural sweetness.
Poached — Gently simmered in light sugar syrup with vanilla or cinnamon, served as a dessert or compote.
Baked in pastry — Halved or whole and embedded in tarts, clafoutis, pies, and cakes, where they retain their shape and flavor.
Coulis/sauce — Blended and strained into a smooth fruit sauce, served as a complement to desserts, ice cream, and meat dishes.
Dried — Sun-dried or commercially dehydrated for extended storage, used in compotes, baking, and as a snack, though less common than other dried fruits.