How to judge the quality and freshness of coffee? What if the coffee is not fresh?

Professional coffee knowledge exchange More coffee bean information Please pay attention to coffee workshop (Weixin Official Accounts cafe_style)

Do your homework before buying coffee beans

Choose a trusted store: Rather than buying coffee beans from a famous store, it is recommended to buy coffee beans from your own roasting cafe. Because some famous coffee beans will be roasted abroad, it takes at least 2 months to ship from abroad to Taiwan and then to consumers, and once the raw beans are roasted, the flavor will gradually lose and they are not fresh. Under good preservation conditions, raw beans can maintain a shelf life of about 2 years.

How to judge the quality and freshness of coffee beans

Green green coffee beans are best: normal green beans have a slightly green appearance, if there are small black holes on behalf of worms, coffee spots on behalf of moldy situation, if yellow or black, it represents more serious moldy situation, or even acidification.

How to judge the quality and freshness of coffee beans

Roasted coffee beans are picked like this: look, smell, peel

POINT 1:"Look" at the surface grease

How to judge the quality and freshness of coffee beans

Lightly baked beans, whether freshly baked or stored for a long time, are less likely to have grease on the surface. Deep fat is released to the surface by baking at high temperatures and visible oil droplets appear. Don't think it's not fresh, after stirring and packaging, the oil will be evenly distributed on the surface of the coffee beans.

Coffee beans have different flavors according to the fire, light roast coffee beans show distinct clear acid; medium fire roast presents sweet with slightly sour; deep roast coffee drinks thick throat rhyme. Hand-picked beans to remove damaged beans, can avoid affecting the coffee flavor, it is recommended to purchase unground baked beans, in order to see the quality of complete beans, before brewing and grinding can also maintain the freshness and aroma of beans.

Point 2: Smell the aroma

Fresh light baked beans have fresh fruit, spice and honey aromas depending on the region, while deep baked beans have chocolate and stone fruit aromas. If the coffee beans are not fresh, whether light or deep roast have oil consumption smell.

Point 3:"peel" with your hands

How to judge the quality and freshness of coffee beans

Fresh coffee beans have less moisture and harder tissues, and it is not easy to peel them into two halves with both hands, while not fresh coffee beans absorb moisture in the air for a long time, and the tissues are soft and easy to peel into two halves.

POINT 4: Inspect outer packaging

How to judge the quality and freshness of coffee beans

Design with ventilation valve is better:

Baked coffee beans will continue to release carbon dioxide for 1~2 weeks, causing coffee packaging expansion, it is recommended not to buy vacuum packaging, on behalf of its carbon dioxide release period. Can choose the inner lining of opaque aluminum foil, surface with one-way vent valve packaging, carbon dioxide can be discharged, but oxygen will not enter to make it not fresh.

How to judge the quality and freshness of coffee beans

Note the date marking:

Roaster coffee shops usually stamp the date on the package with the date of roasting rather than the date of packaging. It is recommended to buy about half a pound at a time and drink it within a month.

How to confirm the quality of coffee after brewing

Hand flushing method: Put freshly ground coffee powder (recommended particle size with No.2 granulated sugar) into soaked filter paper, with the ratio of coffee powder to water of 1:15, put 93 degrees Celsius hot water (about boiling water for 1 minute), and pour it clockwise from the center of coffee powder surface for 3~3.5 minutes.

How to judge the quality and freshness of coffee beans

Simple cup test method: Put freshly ground coffee powder (recommended particle size with No.2 granulated sugar) into a wide mouth cup or rice bowl to smell dry incense, then pour hot water at 93 degrees Celsius in the ratio of coffee powder to water of 1:18, let stand for 4 minutes, push the surface coffee grounds forward with a spoon, smell wet incense, and remove residue. Finally, like smoking ramen, drink a spoonful of coffee, let the coffee in the mouth mist, with the mouth connected to the nose after the smell taste, if the coffee is not fresh, will appear too sour, even bitter taste.

How to judge the quality and freshness of coffee beans

Coffee beans preservation method: coffee beans ground into powder, air contact area increases, will accelerate coffee oxidation, people suggest to buy can adjust the particle size of the grinder, brew coffee before grinding. The rest of the coffee beans together with the original packaging into sealed cans (bags), and then put into the refrigerator in the fruit and vegetable freezer to preserve fresh.

How to judge the quality and freshness of coffee beans

Coffee beans Frequently Asked Questions

Is there a difference in aroma?

After roasting and grinding, the coffee powder before brewing is called "dry fragrance"; the aroma of the coffee powder left after brewing is called "wet fragrance." Before drinking coffee, you may wish to use your sense of smell to feel the rich changes between dry and wet coffee beans. In addition, in recent years, the common hand-brewed coffee pays attention to temperature control, showing a clearer and more delicate taste, which is elegant than the strong black coffee cooked in the siphon pot. Each brewing method brings out coffee flavor, depending on factors such as roasting degree or water retention of coffee beans.

How long is the tasting period?

Freshly baked beans are usually cooked for two to three days to taste the full flavor of the beans. It is recommended to buy half a pound each time. Drink it every day for about two weeks. Try to drink it within one month after opening. The taste is best.