Three ways on how to prevent your tea from getting bitter
Lower water temperature
Maybe you are using water that’s too hot. Every tea is different, even two different sencha teas can be brewed differently. To get to the optimum water temperature and feeling for right brewing, you need to experiment. General rules of 70-75 degrees for brewing green teas excluded, for ex. genmaicha. You can use boiling water for genmaich. Or for example gyokuro. Gyokuro sometimes requires water temperature to be as low as 40 degrees Celsius.
Use shorter steeping time
Two-three minutes steeping rule should not be used to often. Some types (for eg. some gao shan teas, some tie guan yin, some shu pu’er teas), turn out excellent after one loooong steeping which can be up to 10 minutes. But, the green tea leaves should almost never be left in water for two or three minutes (first steep). Bitterness will become inevitable.
Use less tea leaves
Use less tea leaves. Maybe you are using too much tea leaves, which is causing your tea to be too strong or bitter. But, if I really had to chose between using too much or too little, I would opt for too much. Using too much tea leaves can result in a tea that’s bitter, but using too little will never get the good results. If the tea is prone to bitterness, be careful. Always look for the optimum quantity and don’t use teaspoons or tablespoon. If you are trying to become a serious tea drinker, invest in a small kitchen scale showing up to 0.1 gram. Later when you get the feeling about quantities, you will be able to judge by the eye.
Drink tea while still hot
Drink tea while still hot. Some teas react badly to cooling down and are not meant to be drank cold. If you want to drink cold tea, use cold-brewing – poor cold water over leaves in a large teapot and leave it in a fridge for 12 hours (or at least 4). If you let your tea cool down, not only will bitterness get stronger, the taste will also be changed and in many cases bad. That kind of tea I usually use for watering the plants.
Keep in mind
Some teas require a little bit of bitterness. That bitterness will cause a sweet aftertaste after gulping up your cup. However, no real tea in the world should be bitter in a way you cannot even drink it. Japanese and Chinese green tea should not be overly bitter, and with the right brewing you can achieve the ultimate experience and taste.