The density of cupcake batters was fixed at 0.38 g/mL, meaning that the specific volume was 2.63 mL/g. The specific volume of sponge cake batters made from wheat flour was w2.15 mL/g (Gómez, Doyagüe, & Hera, 2012). The difference between specific volumes of batters revealed that the density of rice flour was higher than that of wheat flour