The knack of distinguishing the freshness of coffee beans

Nose smell: fresh coffee beans have a strong smell, otherwise tasteless or bad smell

Look at it: good coffee beans are complete in shape and full in size, otherwise they are incomplete in shape.

Hand pressure: fresh coffee beans are crisp and fragrant when they crack.

Color: dark black coffee beans, the coffee brewed has a bitter taste, the color of yellow coffee beans, brewed coffee with a sour taste.

1. Judgment of appearance

Delicious coffee can be known from the shape of its roasted coffee beans, as shown in the picture, of course, there can not be bad coffee beans mixed with, more importantly, normal beans will be mixed with high-quality coffee beans, causing hindrance, brewing delicious coffee roasted beans, first of all, the beans must be big and fat, and uniform, and the second is the same size and no color spots. These are the main points of visual discrimination, and if you look at them carefully, it should not be difficult to tell.

Fermented beans: coffee beans that fall from the soil before harvest. The sour smell will have a great impact on the taste of coffee.

Dead beans: also known as unripe beans, or affected by climate and other factors, imperfect development, fried spots will be produced after baking, so that the coffee has a green taste.

Black beans: fermented beans, rotten, blackened coffee beans. Because it is black, it can be distinguished from normal coffee beans at a glance.

Borer beans: coffee beans eroded by insects.

Defective beans: it may be stuck during work, or carelessly handled during handling, resulting in incomplete coffee beans. Will cause fried spots when baking, and will produce bitter and astringent taste.

Others: remaining thin-skinned beans, stunted beans, beans that are not completely sour when dried, shell beans with only shell, and so on.

two。 Judgment during grinding

After fully roasting and extracting water from the coffee, you can brew the delicious coffee. When the coffee beans are ground, you can tell that the good coffee beans will gently emit the sound of salad salad and shake the hand gently when they are grinded. The original taste of coffee is overflowing. Shoddy coffee beans will have a creaking sound. There is a feeling of sticking during grinding.

3. Judgment at the time of pawn

The easiest way to make delicious coffee is to sigh the filter paper. When brewing, there is also a way to judge whether the coffee is delicious, that is, whether the powder expands loosely in hot water, and when the coffee is fully roasted and extracted water, there will be beautiful and meticulous foam puffing up.

4. Judgment after pawn

Although the concentration of coffee will change due to different roasting degree and extraction method, the characteristic of delicious coffee is that the coffee liquid extracted by the pawn is clear under the same conditions. The spoon can be clearly seen through the stroke fluid in the following picture, while the one on the right is almost invisible. One cup alone is difficult to tell, but if compared, whether the coffee is delicious or not can be seen at a glance. A cup of delicious coffee, even after 30 minutes, is still clear, and the taste will not change.

5. Judging from the taste and aroma of coffee

The sour taste of delicious coffee is as refreshing as citrus fruit, without strong sour taste. Bitterness is a soft bitterness. There is no bitterness like cigarette or scorched taste.

6. Judging from the quality of raw beans

The shape, grinding stage, stroke, post-stroke, taste and flavor stages have been discussed before, as the focus of judging whether the coffee is delicious or not, but these are all for completely roasted coffee beans. The raw beans before roasting are green, commonly known as [Green]. If the quality of raw beans is poor, no matter how hard you cook them, you will not be able to brew beautiful coffee. Raw beans are usually exported from the place of origin two months after harvest, and this year's crop is called New Crop, after a year it is called Past Crop, and after a longer period of time it is called Old Crop. Coffee beans are crops, and their freshness will naturally affect their taste. Fresh raw beans can enjoy the distinct characteristics and vibrant flavor of each variety. Take rice as an example, if it is placed for a long time, its original flavor will fade with the loss of water. Fresh raw beans, showing a bright green color, can be easily distinguished. In addition to freshness, no matter what kind of variety, we should also try to choose raw beans with large particles and no color spots.