Kalonji, commonly known as Nigella sativa or black seed, consists of small, angular black seeds sourced from the flowering plant of the same name. These seeds originate from the Nigella sativa plant, which belongs to the buttercup family. Kalonji imparts a mildly bitter and peppery flavor, accompanied by subtle onion-like notes. The seeds are frequently utilized as a spice in a variety of culinary dishes.