A method of preparing processed cheese is disclosed, comprising the steps of: forming a mixture comprising natural cheese(s) and a dairy based Ca-depleted sodium caseinate emulsifier substantially free of whey proteins； heating the mixture to about 80°C to about 142°C under stir- ring until a homogenous mixture is formed； cooling the homogenous mixture to provide processed cheese. Also, a dairy based Ca-depleted sodium caseinate emulsifier substantially free of whey proteins, method for its preparation and its use in the production of processed cheese are disclosed.
