Abrégé
A sweetener according to exemplary embodiments comprises: a core including one selected from erythritol, xylitol, sorbitol, maltitol, mannitol, inositol, lactitol, isomalt, and allulose; and a shell surrounding at least a portion of the core and including one selected from stevia, enzyme-treated stevia, steviol glycoside, mogroside, thaumatin, sucralose, aspartame, saccharin, acesulfame potassium, and neotame, wherein a content ratio of the shell to the core may be 0.002 to 0.05. The sweetener has a core-shell structure, wherein the core and the shell are each made into a single raw material without any separate additives (e.g. excipients), and thus is close to zero calories.