Nigella (Kalonji)
What it is
The matte-black, angular, three-cornered seed of Nigella sativa, a flowering plant of the buttercup family. It is one of the most mislabeled spices in the world: sold as "black cumin," "black caraway," "black onion seed," and even "fennel flower seed" — it is none of these. It is not a cumin, not a caraway, not an onion, and not a fennel.
How it's made
Seeds are harvested from the dried seed capsules and cleaned; sold whole (they're too hard and oily to grind well).
Flavor profile
Toasty and complex — oregano-and-thyme herbaceousness with a peppery, slightly bitter, faintly onion-like edge, driven by thymoquinone and p-cymene. The onion association is purely a flavor echo; there is no onion in the plant. Dry-toasting or frying in oil blooms the aroma dramatically — raw, it is much flatter.
Culinary uses
Sprinkled on naan, Turkish and Middle Eastern flatbreads and simit, and savory pastries; a key member of Bengali panch phoron (the five-seed temper); pickles, dals, and vegetable dishes across the Indian subcontinent; some North African and Levantine spice mixes.
Regional variations
Indian/Bangladeshi kalonji is the panch-phoron and bread type; Turkish and Middle Eastern çörek otu is the flatbread-topping type; the two uses dominate.
Cultural & historical context
Nigella has a long medicinal pedigree — it's the "black seed" praised in classical Islamic medicine (habbat al-barakah, "the seed of blessing") and reportedly found in Tutankhamun's tomb. Its tangle of misleading common names is a genuine sourcing hazard: a recipe calling for "black cumin" might mean nigella, or Bunium persicum (true black cumin), or even ordinary cumin, and the dishes those produce are wildly different. For a knowledge platform, nailing the botany is the whole point.
Reference notes
Tags: `Whole`, `seed spice`, `Ranunculaceae`, `frequently-mislabeled`. Build explicit `not-the-same-as` relationships to Cumin, Black cumin (Bunium), Caraway, and Onion seed — a flagship disambiguation entry. Related ingredients: Black cumin, Cumin, Mustard, Fenugreek (panch phoron). Related cuisines: Bengali/Indian, Turkish, Middle Eastern. Suggested links: → Panch Phoron, → Cumin, → Caraway.