All the colors, aromas and flavors of macchiato coffee are characterized by some chemical changes in raw coffee beans after baking.
Bitterness: caffeine, one of the basic flavor elements of coffee.
Sour taste: tannin acid, the second basic flavor element of coffee.
Rich alcohol: strong coffee, mellow taste.
Sweetness: when the sugar in the raw beans of coffee is partially coked after the baking process, the rest is sweet.
Fragrance (coffee aroma): fat, protein and sugar in raw beans of coffee are important sources of aroma.
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