How to choose coffee beans and how to tell whether coffee beans are good or bad

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

In addition, the purity of coffee beans is also another consideration. When professionals choose coffee, they don't necessarily look at the size of the particles, but grab a handful of individual coffee beans (Regional Coffee), 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 (Blended Coffee), it is a normal phenomenon that the size and color are different. And heavy heat and medium-deep roasting will cause coffee beans to produce oil, but lightly roasted beans, if they produce oil, indicate that they have gone bad, not only reducing aroma, but also astringent and sour taste. In short, when choosing and buying coffee, we should pay attention to its freshness, aroma and stale flavor, and the ideal purchase quantity is to be able to drink it in half a month.

"fresh" is the most important factor in buying coffee beans. There are several steps to judge whether the beans are fresh or not.

1. Look: grab a handful of coffee beans and feel whether they are solid beans with the palm of your hand.

2. Smell: whether it is enough to smell the fragrance close to the nose.

3. Pressure: fresh coffee beans are fresh and crisp, and the fragrance floats out when they crack. You can put a bean into your mouth and bite it twice. The crisp sound indicates that the beans are well preserved without dampness.

4. Color: dark black coffee beans, the coffee brewed has a bitter taste; yellow coffee beans, the coffee brewed has a sour taste.

Good coffee beans: neat shape, bright color, roasted by single stir-fry, mellow after cooking, full of stamina.

Bad coffee beans: different shapes, incomplete individuals, light fragrance after cooking, not sweet enough.