Here's how to make the perfect sponge cake using rice flour. This gluten-free recipe doesn't use wheat flour or butter, resulting in a moist and fluffy cake. Whisk the eggs thoroughly while they are cold, and reduce the whisk speed to eliminate coarse bubbles and create a fine texture. When mixing the flour and liquids, ensure the batters are of similar consistency to avoid failure and ensure even mixing. After baking, while the cake is still hot, gently tap the mold to release steam and prevent shrinkage.