A liquid seasoning includes a seasoning liquid and ingredients, wherein the seasoning liquid and the ingredients are prepared by subjecting a raw material including at least an onion ingredient and an organic acid to a heat treatment, wherein an amount of cycloalliin in the liquid seasoning with respect to an amount of the onion ingredient swollen in the seasoning liquid is 0.30% by mass or more, and wherein pH of the seasoning liquid is 2.5 to 4.5.