Best Vanilla Cake

Bahan-bahan (12 porsi)

• 3 and 2/3 cups (433g) cake flour (spooned & leveled)
• 1 teaspoon salt
• 2 teaspoons baking powder
• 3/4 teaspoon baking soda
• 1 and 1/2 cups (340g) unsalted butter, softened to room temperature
• 2 cups (400g) granulated sugar
• 3 large eggs + 2 additional egg whites, at room temperature*
• 1 Tablespoon pure vanilla extract (yes, a Tablespoon!)
• 1 and 1/2 cups (360ml) buttermilk, at room temperature*
• 1 and 1/2 cups (340g) unsalted butter, softened to room temperature
• 5 and 1/2 cups (650g) confectioners’ sugar
• 1/3 cup (80ml) whole milk or heavy cream
• 1 and 1/2 teaspoons pure vanilla extract
• 1/8 teaspoon salt