White Chocolate Mousse Cake

- Vanilla Sponge Cake: All-purpose flour, granulated sugar, unsalted butter, eggs, whole milk, baking powder, salt, pure vanilla extract.

- White Chocolate Mousse Filling: High-quality Belgian white chocolate, heavy cream, organic beef kosher gelatin, salt.

- Swiss Buttercream: Egg whites, granulated sugar, unsalted butter, pure vanilla extract, salt.