Tres Leches Cake

Name: Tres Leches Cake
Prep time: 30 min
Cook time: 15 min
Total time: 45 min
Yield: 12
Ingredients: For the sponge cake:; 1 tablespoon melted unsalted butter, for brushing the cake pan; 3/4 cup + 1 tablespoon(178g) granulated sugar, divided; 6 large eggs, whites and yolks separated; 1 teaspoon vanilla extract; 1/2 teaspoon kosher salt; 1 1/2 cups (173g) cake flour, sifted; For the milk mixture:; 1 1/2 cups whole milk; 1 (12-ounce) can evaporated milk; 1 (14-ounce) can sweetened condensed milk; 1 tablespoon brandy, optional; 1 teaspoon vanilla extract; For the whipped cream topping:; 3 cups heavy cream; 1/2 teaspoon vanilla extract; 1 cup powdered sugar; Ground cinnamon