Overview

Brassicas are a genus of plants in the mustard family (Brassicaceae), known for their pungent, sulfurous flavors and dense nutritional profiles. The group includes cabbage, cauliflower, broccoli, Brussels sprouts, kale, turnips, and mustard seeds. Their edible parts range from leaves and flower buds to stems, roots, and seeds.

Origin and history

The genus Brassica is native to the Mediterranean region and temperate Eurasia, with domestication dating back over 4,000 years [2]. Ancient Greeks and Romans cultivated several forms, and the plants spread across Europe and Asia through trade and migration. The wide morphological diversity within the genus results from selective breeding of a small number of ancestral species, particularly Brassica oleracea (the wild cabbage) and Brassica rapa (turnip and field mustard). Brassicas became a staple in European and Asian cuisines, valued for their cold hardiness and storage life.

Varieties and aliases

  • Cabbage (Brassica oleracea var. capitata)
  • Cauliflower (Brassica oleracea var. botrytis)
  • Broccoli (Brassica oleracea var. italica)
  • Brussels sprouts (Brassica oleracea var. gemmifera)
  • Kale (Brassica oleracea var. sabellica)
  • Kohlrabi (Brassica oleracea var. gongylodes)
  • Turnip (Brassica rapa subsp. rapa)
  • Mustard greens (Brassica juncea)
  • Rapeseed / canola (Brassica napus)
  • Bok choy (Brassica rapa subsp. chinensis)
  • Napa cabbage (Brassica rapa subsp. pekinensis)
  • Collard greens (Brassica oleracea var. viridis)
  • Broccolini (Brassica oleracea var. italica × alboglabra)
  • Romanesco broccoli (Brassica oleracea var. botrytis)

Culinary uses

Brassicas are prepared in nearly every cooking method: raw in salads and slaws, steamed, boiled, roasted, stir-fried, fermented, and pickled. Cabbage is fermented into sauerkraut in Central Europe and kimchi in Korea. Broccoli and cauliflower are common in Western stir-fries, gratins, and soups. Mustard seeds are ground into condiments or used whole in Indian tempering. The leaves of kale and collard greens are braised or sautéed, often with pork or smoked meats. Brassicas pair well with fats (butter, olive oil, bacon fat), acids (vinegar, lemon), and pungent aromatics (garlic, ginger, chili).

Cross-cuisine context

Brassicas are foundational across many of the cuisines represented on the Yum platform. In Mexican cuisine, nopales and quelites (wild greens) are more common than brassicas, but cabbage appears in tacos de canasta, as a crunchy topping for carnitas, and in curtido (a Salvadoran fermented slaw that also appears in Mexican border regions). In Korean cuisine, napa cabbage is the base of baechu kimchi, the national staple. In Chinese cuisine, bok choy and gai lan (Chinese broccoli) are stir-fried with garlic or oyster sauce. In Japanese cuisine, hakusai (napa cabbage) is used in hot pots (nabe) and pickled as hakusai-zuke. In Vietnamese cuisine, cabbage appears in salads (gỏi) and soups (canh). In Armenian cuisine, cabbage is stuffed (tolma) or fermented. In Russian cuisine, sauerkraut (kvashenaya kapusta) is a winter staple. In Peruvian cuisine, cabbage is used in salads and as a garnish for ceviche. In Salvadoran and Guatemalan cuisines, curtido (fermented cabbage with vinegar and oregano) accompanies pupusas. In Arabic cuisine, cabbage is stuffed (malfouf mahshi) or used in salads. In Persian cuisine, cabbage is less prominent but appears in some khoresh (stews). In Filipino cuisine, cabbage is used in pancit and lumpia. In Cambodian cuisine, cabbage appears in stir-fries and salads. No direct analogue exists for the entire genus, as brassicas occupy a unique niche of cool-weather, sulfurous greens and storage vegetables.

Notes for cooks

  • Brassicas release sulfur compounds when overcooked, producing an unpleasant smell and bitter taste. Cook until just tender, then shock in ice water if serving cold.
  • The stems and cores of broccoli and cauliflower are edible and can be peeled, diced, and cooked alongside the florets.
  • Brassicas store well in the refrigerator for one to two weeks. Wrapping in a damp towel or perforated bag helps retain moisture.