PROBLEM TO BE SOLVED: To provide an agent for effectively improving the volume of dough-heated food at low cost without using a chemically synthesized emulsifier, an agent for improving dough extensibility, and softness of dough-heated food. It is possible to provide an agent for improving the texture of the dough, an agent for improving the texture of the dough-heated food, a method for producing the dough, and a method for producing the dough-heated food. SOLUTION: A volume improving agent for dough-heated food contains reduced starch syrup having the following sugar composition as an active ingredient; 1 to 50% by mass of monosaccharides, Disaccharide is 6-55% by mass, 7-25% by mass of trisaccharide, 1-10% by mass of tetrasaccharide, 1-81% by mass of pentasaccharide or more. [Selection diagram] Fig. 1
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