Excuse me, that kind of coffee has a little sourness

It has something to do with coffee beans, and these are normal. Because coffee beans themselves are acidic fruits. If it is particularly acidic, it is a problem with the quality and roasting of the coffee beans. For example, Brazilian coffee has a sour taste.

Coffee flavor: four flavors and one fragrance, bitter, sour, mellow, sweet, fragrant (coffee aroma).

Explanation: The flavor of coffee has 4 flavors, there are hundreds of kinds of incense, there are only 4 kinds of flavors, which are sweet and sour, all coffee has a sour taste, only Sumata Ramante twist sour taste is relatively light, if you don't want to taste it, you can hardly drink it, the sour taste of instant melting coffee is very obvious, it is not recommended to drink, the best sour taste is that the coffee is produced in Hawaii, if you are interested, you can try it.

The pH of light roast coffee is in between, the pH value of medium and dark roast coffee is around 5, and the pH value of dark roast coffee is above. In terms of our ordinary people's taste buds, it is difficult to detect the sourness if the pH value exceeds the above, so it is not easy to drink the sourness of dark roasted coffee, while the sour taste of light roast coffee will be more obvious.

Therefore, when we drink coffee, don't make a fuss and feel that it tastes sour, it's normal for coffee to have a sour taste.

Coffee has a strong sour taste due to the acidic substances contained in coffee beans, which also produce acid during the roasting process, coffee beans are rich in tannins, and coffee becomes sour when cooled. The detailed reasons are as follows:

1. Acidic substances exist objectively in coffee beans, and the sour components contained in green coffee beans include citric acid, malic acid, phosphoric acid, etc.

2. The sourness tasted in coffee mainly comes from the acid produced during the roasting process.

3. The lower the degree of roasting coffee, the more obvious the sourness, and many darker roasted coffees will not have this problem.

4. Coffee will become sour after cooling, coffee beans themselves are a kind of fruit, rich in tannins, when the coffee temperature drops, tannic acid is released, and when the temperature is lower, the human taste is more obvious to the sourness.

There is no such thing as a good or bad coffee, it is a normal phenomenon.

Coffee itself is an acidic fruit, which is somewhat acidic, and it is normal for it to become sour after roasting. Coffee has a sour taste, but the sour the better. The flesh of the coffee fruit itself is sour, so the coffee beans will also have a certain fruity taste.

When drinking coffee, if the sour taste is not serious, it means that the sour taste of the coffee is a normal phenomenon. However, if the sourness is too strong, consider whether it is caused by the deterioration of the coffee beans, and you need to stop drinking coffee in time.

In the scoring items of specialty coffee, one criterion is acidity, which is different from the sour taste of ordinary foods, it is a coffee flavor close to the sourness of fruits, which can be divided into citric acid, malic acid, tartaric acid, acetic acid, chlorogenic acid and other types.

There are four factors that affect the sour taste of coffee

1. Origin of coffee beans: Coffee cherries are a kind of fruit, so coffee beans are originally fruity, and the soil properties and climate of different origins will affect the growth of coffee cherries, and then affect the sourness of coffee.

2. Coffee tree varieties: Different coffee tree varieties will also affect the sour taste of coffee. There is no absolute relationship between coffee sourness and coffee quality, but generally good quality coffee has a refreshing sour taste, and improperly processed coffee sour taste is close to sourness.

3. Coffee bean treatment method: the sour taste of coffee in the old residue method at the washing place is usually mild and clear; The law of sun treatment is relatively strong.

4. Roasting degree of coffee beans: The roasting time is extended, the acidity of coffee beans will be decomposed, and gradually replaced by roasting and bitterness, so the sourness of light roasted coffee is stronger.

Among the coffee, cat poop coffee basically has no sour taste, and it can also be used with milk to make the fragrance stronger, as follows:

Ingredients: coffee machine, ground coffee, water, condensed milk.

1. Use the measuring spoon provided by the coffee machine to take a spoonful of cat poop coffee powder.

2. Use the other end of the measuring spoon to flatten and compact the coffee grounds, and don't press too porcelain, otherwise the coffee will come out too slowly.

3. This is the pressed coffee powder, pay attention to the coffee powder on the side to remove a little.

Fourth, when loading the handle, be sure to wipe the edge clean, and there can be no coffee powder residue, otherwise it will leak.

5. Install the handle on the coffee machine according to the direction requirements, add purified water to the water tank, and then turn on the power, generally a spoonful of ground coffee can be worth 30 ml of espresso.

6. Brew the espresso and prepare a cup of condensed milk.

7. Pour the stirred condensed milk into the brewed espresso.

Coffees all have a sour taste, and the better the better, the more sour, most of the time. You can add milk to remove the sourness, no problem without sugar, I just drink it, and if I make my own coffee, sometimes I will cook it twice, sometimes it is not bad, with a faint fragrance and not bitterness.