A sponge cake is a light and airy dessert made primarily from flour, sugar, and eggs. The unique texture comes from the air incorporated into the batter during mixing, which helps the cake rise. Sponge cakes can be enjoyed plain or flavored with ingredients like vanilla or lemon. These cakes are often used as a base for layered desserts, such as layer cakes or trifles. They can be filled with creams, fruits, or jams, and are sometimes frosted with buttercream or whipped cream. Sponge cakes are popular for celebrations, including birthdays and weddings.