The invention relates to using a lipid acyltransferase polypeptide (SEQ ID NO: 68) in the manufacture of ultra-heat treatment milk (UHT) for improving the stability, the perceptible sensory difference, the smell, and the taste； and for reducing the cholesterol content, and for eliminating or reducing creaming of the UHT milk. The invention also relates to a method of producing UHT milk, wherein the method comprises admixing a lipid acyltransferase with milk and heating the mixture to make it a UHT milk.
