Efficient utilization of a whey protein for the produc
tion of cheese, which results from the cheese produc
tion as a by-product. The whey is concentrated by an
ultra?ltration and added to the concentrated milk. A
milk coagulating enzyme and a lactic acid bacteria
starter were added to the resultant mixture together
with warm or hot water with stirring to instantaneously
elevate the temperature of the reaction mixture to coag
ulate and give the cheese curd.