Carbonic anhydrase 1 is an enzyme that in humans is encoded by the CA1 gene. Carbonic anhydrases are a large family of zinc metalloenzymes that catalyze the reversible hydration of carbon dioxide.
It is becoming more common that the latte macchiato will have a layer of milk foam on the top of the drink as well. A latte is steamed milk, espresso, and a 1/4 inch of foam ontop. It is prepared in this order: flavored syrup (if applicable), espresso, steamed milk, topped with 1/4 inch of foam.
But I want my caramel macchiato sweeter, like a vanilla latte!. Yes a vanilla latte gets a pump more vanilla than a caramel macchiato does, but here is a common misconception. Starbucks does not charge for extra syrup in a drink that already has that syrup in it.