White Layer Cake | America's Test Kitchen

Ingredients

• 1 cup whole milk, room temperature
• 6 large egg whites, room temperature
• 2 teaspoons vanilla extract
• 2 1/4 cups (9 ounces/255 grams) cake flour
• 1 3/4 cups (12 1/4 ounces/347 grams) sugar
• 4 teaspoons baking powder
• 1 teaspoon table salt
• 12 tablespoons unsalted butter, cut into 12 pieces and softened but still cool