The use of soymilk instead of water when making gluten-free rice flour bread significantly increases the dough
volume after yeast fermentation. The soymilk solids function to increase the dough viscosity, reducing the amount
of CO2 that is released through the dough’s surface. Additionally, more CO2 is generated due to the sucrose content
of soymilk. Dough made with soymilk rises better during baking than does dough made with water. We found
that glycinin and β-conglycinin contained in soymilk prevent gas cells from merging or collapsing during yeast
fermentation and baking. Therefore, this study suggests that the use of soymilk may affect the rising of gluten-free
rice flour bread.