The present invention is directed to a sponge cake premix that can be cooked
easily with a microwave oven to prepare a sponge cake. A batter prepared by adding
a thermocoagulation protein to a sponge cake premix containing as a main ingredient
a cereal powder consisting of starch and a pregelatinized starch is cooked under
heat with a microwave oven to obtain a sponge cake that permits eliminating the
gum-like hard texture inherent in conventional sponge cakes of this type and exhibits
a light and soft texture. The obtained sponge cake is free from bake shrinkage
and exhibits a good-looking voluminous appearance.
