The present invention provides a process for the manufacture of a dairy product or nutritional formula, such as an infant formula, which has a fat particle distribution with resembles human breast milk. The process comprises mixing vegetable fat, protein and carbohydrates in a high shear rotor stator mixer and subsequently subjecting said mixture to homogenization so as to provide a composition with a monomodal fat particle size distribution and a low proportion of fat particles below 1 μm. further aspects of the invention relates to the dairy product or nutritional formula per se and the use of said dairy product or nutritional formula.本發明係提供一種製造乳製品或營養配方之方法,例如嬰兒配方,其具有相似人類母乳之脂肪顆粒分佈。該方法包括將植物性脂肪、蛋白質及碳水化合物於高剪切轉子定子混合機中混合,隨後使該混合物均質化,以提供具有單峰脂肪粒徑分佈及低比例之小於1 μm脂肪顆粒之組合物。本發明之另一態樣係關於乳製品或營養配方本身,及該乳製品或營養配方之用途。