This red velvet chiffon cake recipe is a secret recipe that is perfect for any red velvet lover. The cake is light and fluffy, with a rich red velvet flavor. The secret to this recipe is the use of buttermilk and vinegar, which gives the cake its tangy flavor and helps to activate the baking soda. The cake is perfect for a special occasion and can be served with a cream cheese frosting or a dusting of powdered sugar.