[problem], which provides, shifts sweet taste well balanced between the display that sweetener includes liquid fermented milk, tart flavour etc. in wide liquid temperature range in 10oC or more down to the temperature (for example, 80oC) for being more than room temperature. Sweetener of the invention is using the temperature containing liquid fermented milk liquid 20oC or higher contains the big sweetener of sugariness. The example of intensity sweeteners includes Sucralose, Aspartame, acesulfame, neotame, etc.. A kind of liquid fermented milk that produces includes: that lactic acid fermentation agent is added to the curdled milk of fermenting raw materials cream in fermentation step, therefore conducting fermentation is to obtain containing acidified milk Curdled milk grinding steps grind curdled milk and generate liquid fermented milk Having with sweetener addition step mixes liquid acidified milk makes sweetener level sweetener include liquid fermented milk.
