The present invention relates to a liquid unit dose comprising a water-soluble packet and a liquid encased within the packet, the liquid being a detergent composition comprising: from 5% to 80% by weight of surfactant; from 1% to 15% by weight of non-aqueous solvent; less than 10% by weight of water; wherein the liquid detergent composition comprises fatty acid and further comprises fatty acid soap, wherein the molar ratio of fatty acid to fatty acid soap is from 5:1 to 1:5, and wherein the total level of fatty acid (neutralized and unneutralized) is from 20% to 50% by weight of the liquid composition.