Overview

Cucumber (Cucumis sativus) is a creeping vine in the gourd family Cucurbitaceae, grown for its cylindrical, fleshy fruits that are botanically pepos but culinarily treated as vegetables. The fruit has a mild, watery, slightly grassy flavor with a crisp, crunchy texture, especially when eaten raw with the skin on. Cucumbers are valued for their cooling, hydrating properties and versatility across raw, pickled, and cooked preparations.

Origin and history

Cucumber is native to Southern Asia, with evidence of cultivation in India for at least 3,000 years [1]. Today, China, Turkey, Iran, Russia, and the United States are among the top producers [2].

Varieties and aliases

  • Slicing cucumber: The common long, dark-green cucumber sold fresh in supermarkets, with a thick, waxy skin often coated in food-grade wax for shelf life.
  • Pickling cucumber: Smaller, bumpier, and thinner-skinned, bred for brine fermentation and vinegar pickling. Includes gherkin types.
  • Burpless cucumber: Also called seedless or English cucumber. Long, slender, thin-skinned, with minimal seeds and low cucurbitacin content, which reduces bitterness and digestive gas.
  • Persian cucumber (khiar): Small, slender, thin-skinned, eaten whole with peel intact. A staple in Iranian cuisine.
  • Japanese cucumber (kyuri): Dark green, thin-skinned, crisp, with small seeds. Used in sunomono and asazuke.
  • Kirby cucumber: A common pickling variety in the United States, short, bumpy, and crunchy.
  • Armenian cucumber (Cucumis melo var. flexuosus): Not a true cucumber but a melon relative. Long, ribbed, pale green, with a mild cucumber-like flavor. Grown in the Caucasus and Middle East.

Culinary uses

Cucumber is most commonly eaten raw, sliced into salads, sandwiches, and cold noodle dishes, or served as a crudité with dips. It is the base of many cold soups.

Notes for cooks

  • Bitterness: Cucurbitacin compounds concentrated near the stem end and in the skin can cause bitterness. Burpless and English varieties have been bred for low cucurbitacin content. If a standard cucumber tastes bitter, peel it and discard the stem end.
  • Storage: Cucumbers are ethylene-sensitive and will spoil quickly near ripening fruit (apples, bananas, tomatoes). Store in the refrigerator crisper drawer, unwrapped or in a perforated bag, for up to one week. Do not freeze.
  • Seed removal: For salads and dips where excess water is undesirable, halve the cucumber lengthwise and scrape out the seeds with a spoon before slicing or grating. Salting sliced cucumber and letting it drain for 15 minutes removes additional moisture.