American coffee is a kind of coffee and the most common coffee. It is made of black coffee made by using drip coffee pot, or by adding a lot of water to Italian concentration. American coffee has a mild taste. Because the general extraction time is relatively long (about four or five minutes), the caffeine content is high.

Coffee beans contain about 5% to 8% sugar, and most of them are converted into caramel after baking, which is the source of fragrance and bitterness, and the unconverted sugar leaves a little sweetness; Tannic acid is released during baking, which combines with caramel to produce a slightly bitter sweetness. Therefore, people generally have bitter, sour, sweet, fragrant and astringent tastes for coffee.

Steps of drinking coffee: don't rush to drink a cup of coffee before it is served. There should be a gradual process like tea or wine tasting to achieve the purpose of relaxation, refreshing and enjoyment.

The first step is to smell the fragrance and taste the aroma of coffee;

The second step is to look at the color. It is best for the coffee to be dark brown, not dark and bottomless.

The third step, tasting, first take a sip of black coffee and feel the taste of original coffee. The entrance of coffee should be sweet, slightly bitter and slightly sour. Then sip the coffee. Don't swallow the coffee in one gulp. Put it in your mouth for a while, let the coffee and saliva mix with the air a little, and then swallow it.