Can you tell whether the appearance color of coffee beans is fresh?

The color of coffee beans is dark and light. Do you know what it means? A few days ago, at Starbucks'"espresso expert activity", brown fans finally got the hang of it.

Coffee beans range in color from grass green to yellowish orange, light jade cinnamon to dark brown, the most ideal of which is dark brown. Because the longer the high-quality coffee beans are roasted, the more natural volatile oil will be produced and will emerge from the surface, giving off a refreshing aroma, but the weight will also be reduced, which is why many coffee shops choose light roasting. Starbucks espresso roasted coffee, Italian roasted coffee and French roasted coffee use dark brown coffee beans. Through deep roasting, the coffee beans burst, the volume doubled, and the weight was reduced by nearly 1 inch 4. In the process of roasting, coffee beans gradually produce volatile flavor oil, so that various flavors can reach a perfect balance.

Coffee beans are roasted well, and the brewing method is also very important. Espresso is ideal for heavy-flavored deep-roasted coffee beans. It is made by pouring hot water into finely ground coffee beans and boiled under fine ground coffee and pressure rather than gravity. High pressure will completely emulsify the lipids inside the coffee and dissolve it into water, which is the main source of mellow flavor. At the same time, emulsification will make espresso taste thicker, making people drink like velvet, and stickiness will form a lower surface tension, which can invade the taste buds and make mellow reverberate in the mouth. If you want to taste the taste of espresso, it's best to try a rich vanilla latte with espresso as the core.

Coffee beans-Select

Coffee beans

Coffee bean atlas

Choose fresh coffee beans. When buying, pay attention to whether the color of the beans and the size of the particles are the same. Good coffee beans are shiny and have a strong aroma without being mixed with peculiar smell. No matter what kind of coffee beans, freshness is an important factor affecting the quality. When shopping, grab one or two coffee beans in your mouth and chew them with a crisp sound (indicating that the coffee is not damp) and the fragrance of the teeth and cheeks is the top grade, but it is best to squeeze it with your hands to feel whether it is solid, rather than buying crispy coffee. If the coffee bean has lost its fragrance or smells stale, it means that the coffee bean is no longer fresh and is not suitable for purchase.

Freshly fried coffee beans are not suitable for immediate consumption and should be stored for a week to completely release the gas from the beans.

Generally speaking, the best drinking period for coffee is a week after stir-frying, when the coffee beans are the freshest and the Aroma taste is the best.

In addition, the purity of coffee beans is also another consideration. The expert candidate for coffee is not necessarily to look at the size of the particles, but to grab a handful of individual coffee beans (RegionalCoffee), about dozens of portions, to see whether the color of each single bean is the same, and whether the particles are similar in size and shape, so as to avoid buying shoddy products disguised as mixed beans. But if it is a synthetic bean (BlendedCoffee), it is a normal phenomenon that the size and color are different. In addition, heavy heat and medium-deep roasting will cause coffee beans to produce oil, but if the lightly roasted beans produce oil, they have gone bad, not only reducing aroma, but also astringent and sour taste. In short, when buying coffee, we should pay attention to its freshness, aroma and whether it is stale or not, and the ideal purchase quantity should be finished in half a month.