Why can't you drink more caffeine in espresso? how much is caffeine per gram?

Why can't you drink more caffeine in espresso? how much is caffeine per gram?

1. Look at the volume

The standard amount of a perfect Single Espresso is to extract an ounce of coffee essence in 25 seconds.

2. Look at the appearance

The most important sign of a good Espresso is a light camel-colored emulsion Crema, which is a mixture of fat, water and air in the coffee during the extraction process. The Crema should be uniform in color, about 3cm to 5cm thick, shake the coffee cup gently, and the emulsion will stick to the wall like thick syrup. The thickness of the perfect Crema must be at least 4 cm, and it is unbreakable to blow gently. In the case of correct operation, if the Crema becomes golden or even white, the coffee beans have been kept for too long and have expired. Observing the Crema floating on the surface can also judge the operation when making Espresso, if the color is a little yellowish or white, the amount is very small, and the coffee flows out too fast, which indicates that the extraction pressure is too small and the extraction is insufficient, which requires finer grinding, tighter and more uniform filling pressure to increase the resistance of the coffee cake. If the Crema is dark brown or even black, discontinuous or even dripping out, it indicates that the extraction resistance is too high and the pressure is too high for the extraction transition, but for the whole coffee cake, the extraction is insufficient, the powder is too fine, too tight, and too much.

3. Smell

The perfect Espresso should have a pleasant aroma and should never have a scorched smell. If there is a burning smell, then it is a pity that what you drink is a cup of over-extracted Espresso.

How to taste Espresso

Espresso is the most fragrant coffee in the world. You need to drink a cup of water and embellish your mouth before tasting it. The basic tasting method is to smell first. Espresso has a strong and charming aroma and should be well immersed. Then there is the product, Espresso has a variety of genres, of course, according to personal preferences to decide. Basically, there are two kinds, one is to drink it in one sip, the other is to drink it a little first, and then drink it in one sip. There is a difference in the way and feeling of each taste. Basically, what you can taste in one sip is the comprehensive taste of Espresso, while if you drink it in different times, you can taste the stratification of Espresso taste. If you drink a perfect cup of Espresso, you must be able to feel the obvious and flamboyant difference between it and any other coffee you've had. The perfect Espresso allows you to return to your mouth for 20-30 minutes after drinking.