How to tell if you are drinking a good cup of coffee

When my friend was trained in a coffee shop, she learned the difference between hot milk and steamed milk. If you drink hot milk and steamed milk at the same time, the difference between them is obvious. Steamed milk is sweeter, smoother and has more bubbles than hot milk. If you simply heat the milk, there will be a strange animal smell, similar to the taste of people when drinking goat's milk. All this will affect the quality of your coffee. If your taste buds are not sharp enough to recognize these differences, you can also judge the quality of this cup of coffee by listening to the sound of its making. Most coffee shops use steamers to steam their milk, and if so, it will make a scratching sound. But if you hear too many shrill screams, it means the clerk doesn't know how to steam milk properly, and you end up drinking hot milk.

Steamed milk is not only heated, but also adds a lot of air. This is a very important process for making drinks, and I can't explain all the scientific principles here. For example, when you hear James Bond click on his martini, Zhong will say, "shake, don't stir." And you can also feel the difference in tea. Tea that is shaken and exposed to the air is sweeter and slippery than ordinary tea. There is a kind of pull tea in Malaysia, which is a drink that mixes tea with concentrated milk and usually shakes two cups violently in high places to make the drink have a thick foam, so that it tastes smoother than ordinary milk tea. Although the difference is not obvious, I can boldly say that this is the difference between good milk tea and ordinary milk tea.

My friend told me that during her training, she had tasted fresh and expired raw materials in order to understand the importance of using fresh raw materials to make drinks. They asked her to taste a small amount of drinks that had just been made for 5 seconds, 10 seconds and 15 seconds, respectively. The fresh material is black and brown, and there is a layer of coffee oil floating on it, and when it is out of date, the whole material turns black. Within seconds, the sediment of espresso will separate, resulting in a bitter taste. One way to make the raw material timeless is to mix it with milk, water and syrup within 10 seconds. So drinks based on espresso need to be made quickly. If you can't taste the difference, you can see how the clerk prepares your coffee. When the raw materials are ready, count to ten. If he doesn't mix the ingredients in ten seconds, then you will taste a very bitter and astringent drink.