【简易基础香草海绵蛋糕】简单却蓬松柔软的海绵蛋糕

This recipe yields a light and fluffy sponge cake, ideal for special cakes. The batter is made with 3 eggs (150 g), 75 g cake flour, 25 g cornstarch, 90 g sugar, 30 g unsalted butter, and 2 g vanilla extract.