Many people like coffee because of its strong, bitter taste that wakes you up! But there are many people who love the sour taste of coffee. Let’s reveal the secret of sour coffee because, in fact, coffee is a type of cherry fruit.

The fragrant aroma that floats in the air every time it comes in contact with heat, the scent that many people love and feel relaxed is the black seed called coffee. Coffee is a drink made from roasted coffee beans or cherry, which is a type of fruit with the main species that are popularly grown being Arabica and Robusta. In addition to the charming smell, the mellow taste also makes many people fall in love.
Coffee lovers may wonder, Why is coffee sour? Some people may think that sour coffee is low-quality coffee, which is not always the case. Today, ยูฟ่าเบท we will answer your questions.
When the cherry is fully ripe, it produces a unique flavor and aroma of each variety, along with
amino acids, giving the coffee bean its natural acidity.
- Malic acid, the same acid found in green apples, gives brewed coffee its smooth, sour flavor.
- Citric acid gives a sour taste similar to lemon and nectarine.
- Acetic acid gives a sour taste similar to vinegar.
- Quinic acid, which gives a bitter, astringent and sour taste.
In addition to the naturally occurring acidity from the growing area, the altitude of the growing area, the climate, the type and breed of coffee, as well as the processing and roasting process of the coffee beans also have an effect. The level of acidity of coffee can be controlled by roasting, ranked from most acidic to least: light roast, medium roast, and dark roast.
Roasting process
- Light roast: Use a temperature of 350 ºF (176.7 ºC) for about 10-15 minutes. You will get light brown or pale yellow coffee beans, similar to cinnamon. It retains all the flavors of the coffee and has the highest acidity, which is suitable for making hot coffee.
- Medium roast: Use a temperature of 400-430 ºF (204.4-221.1 ºC) for about 15-20 minutes. The coffee beans are brown in color and have a shiny surface from the oils in the beans that coat them. The bitterness increases and the acidity decreases. It is suitable for making hot or cold coffee.
- Dark Roast: Roast time is approximately 15-20 minutes, similar to medium roast, but uses a temperature of 450 ºF (232.2 ºC). The coffee beans are very dark in color, resulting in the most bitter flavor and less acidity, making them ideal for iced coffee.
Another point is the taste in drinking coffee. Some people like strong and bitter coffee. When they drink coffee with sour taste, they dislike it and see it as bad coffee. On the other hand, people who regularly drink coffee with sour taste, when they drink coffee with strong bitter taste, they see it as low quality coffee as well. There is no right or wrong between the two. It depends on personal taste.