Can you use regular flour in a sponge?

It is not advisable to use regular flour for a sponge. Regular flour is generally not suitable for creating a stable foam or whipped texture, called a sponge. Sponges are typically prepared using specific ingredients and techniques, such as egg whites or cream, which are capable of holding air and forming a light, airy structure. Regular flour, made from wheat, does not have the same foaming properties and may not produce the desired result.