The influence of steaming on the flavor of coffee, how to do it well?
Professional coffee knowledge exchange more coffee bean information please follow the coffee workshop (Wechat official account cafe_style)
Steaming is divided into these steps.
Exhaust gas
Coffee beans continue to emit carbon dioxide after roasting, a process called "exhaust". Most of the carbon dioxide will be released quickly after baking, especially within four hours after baking, and the remaining gas will be released continuously over the next few weeks, during which time the amount of gas released will gradually decrease.
When the coffee beans are ground into powder, it will accelerate carbon dioxide emissions, because the surface area of the coffee powder is greatly increased, which in turn affects the release of gas. Many stores' coffee will be discarded if it is not used ten minutes after grinding. )
Stuffy steam
In the first stage of making coffee, you only need to inject a little hot water first. when the hot water comes into contact with the coffee powder, it will accelerate the carbon dioxide emission of the coffee powder, and you can clearly see that the surface of the coffee powder is bubbling, but once again, the degree of expansion does not represent the freshness of the coffee.
The deeper coffee has a lower moisture content, and when it comes into contact with water, it will absorb water and release more gas, thus allowing a greater degree of expansion.
Shallow coffee has a higher moisture content, less water absorption and less gas release when it comes into contact with water, so it is less likely to expand.
This program is called "Bloom".
Extended Reading: insufficient Coffee extraction? Superb? How to know by tasting?
Expansion
The steaming time is usually 20-30 seconds. Once the steaming time is over, hot water should be injected immediately. The judgment point of the end is when the powder expansion is the highest and has not yet collapsed. If you have a scale, you can inject hot water with twice the weight of the powder, or soak the coffee powder with only a small amount of water.
Steaming can have two positive effects on coffee flavor:
First of all, carbon dioxide has a sour taste, if there is no carbon dioxide from the coffee when steaming, it will make the coffee have a bad sour taste.
Second, carbon dioxide will block the contact between water and coffee. Only when carbon dioxide is discharged can the aromatic substances and oils of coffee be completely dissolved.
As long as there is gas in the coffee powder, it will interfere with the water extraction of coffee substances and will make the extracted coffee have an irritating sour taste.
The next time you make coffee by hand, remember to steam first to let the coffee breathe in order to grasp the charming flavor of the coffee and avoid the negative flavor and sour taste caused by carbon dioxide.
- Prev
What is fresh coffee? I'll tell you three ways to explain it.
Professional coffee knowledge exchange more coffee bean information Please follow the coffee workshop (Wechat official account cafe_style) many people know that coffee is also an ingredient and needs to be properly preserved and fresh used. Stale coffee not only tastes dull, but even produces ochratoxin if it is not well preserved, which is harmful to human health. From the first wave of instant coffee to the second wave of coffee
- Next
What information can the date of coffee baking tell you?
Professional coffee knowledge exchange more coffee bean information please follow the coffee workshop (Wechat official account cafe_style) some people say that the roasting date of coffee beans is everything, but want freshly roasted coffee, but do not know what is fresh? The definition of freshness and delicacy is based on the effect of roasting date on coffee. Baking date doesn't mean everything. There are a few things that must be clarified first.
Related
- Be vigilant! Tims employees trick customers into applying for credit cards!
- Tie your hands and put them on display! The video of Gu Ming migrant workers playing a stalk attracted public outrage!
- Can orange peel be used to make coffee? How to make an orange filter cup? Is citrus peel good with special hand-brewed?
- Where is Robsta's hometown? Which countries are Robusta mainly produced in?
- ICO August coffee report: Robusta prices rise to record high
- Encountered the strongest typhoon in 1975! No one can stop Shanghainese from drinking coffee!
- Ruixing Coffee and China Tennis Co., Ltd. are jointly branded, and surrounding products have been caught in a plagiarism storm!
- What kind of coffee is Coffee Queen? What kind of beans does Kona coffee belong to? Arabica, the queen of global coffee
- How to brew coffee correctly? The difference between one-step flow and three-step flow of hand-brewed coffee What impact does the way hand-brewed coffee brew brew have on the flavor of coffee?
- The drink formula is reversed! Buy coffee and get half a cup of apples?!