Determine the characteristics of Italian coffee macchiato coffee with four flavors and one fragrance.

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.