What Makes Tea Bitter?

What Makes Tea Bitter?
Dear Plum Deluxe, why is my tea bitter? Help!
Ugh! I’ve been there: My new Plum Deluxe tea just arrived. I cranked up my work level to earn a good break. I heated water, poured it over my favorite Queen’s Blend Green Tea leaves in the infuser, sat down to wait, and—gah!—I got distracted! Way more than four minutes passed, and my tea was bitter. Sigh.
But what makes tea bitter?
Bitter tea occurs more often with green and white teas than dark oolong, black, rooibos, or herbal teas, and is usually the result of one or more of the following:
  • Quality of the tea leaves
  • Steeping temperature is too high
  • Steeping time is too long
Your tea smells amazing, but you go to take a sip and it's just too bitter! Learn more about what makes tea bitter and what you can do to avoid it.

Quality of the Tea Leaves


If you’re drinking Plum Deluxe tea, you’ve got good quality leaves. (I’m pretty sure it’s not ancient Plum Deluxe tea. Who can make it last that long?) If you’re drinking another brand of tea, it may be poor quality tea. It’s also possible that it’s meant to be bitter. No kidding.
Some teas—green teas, in particular—have a bitter (aka “astringent”) flavor that is cultivated and appreciated by some. Like beer and coffee, bitter tea is an acquired taste.
Image shows a bright orange thermometer on a wooden table, next to a scoop of Queen's Blend green tea leaves and a freshly brewed cup of tea.

Steeping Temperature is Too High


Do you know that green and white teas are supposed to be steeped in water that is below boiling? It was years before I learned this.
Currently, I keep a digital thermometer by my electric kettle, and I measure the water temperature before pouring it over leaves in a mesh basket infuser. Eventually, when this kettle’s life has been lived to its fullest, I’ll get a kettle that allows me to set the desired temperature.
It’s not necessary to be that fussy, though. Tea is forgiving. Anything in the 170- to 185-degree Fahrenheit range is likely to be acceptable for a green or white tea. You can heat your water to a boil and just let it sit for a few minutes.
Image shows the label of two bags of tea—Queen's Blend green tea and Afternoon 'High Tea' white tea—with the brewing temperatures circled.
You should also read the brewing instructions, if possible. Plum Deluxe puts them on every package, listing the ideal temperature for steeping each blend. Blended teas can be different. For instance, the Afternoon ‘High Tea’ White Tea is steeped at a just-below-boiling temperature. That surprised me, but I’m new to white tea.
Image shows a white timer set to four minutes.

Steeping Time is Too Long


In my kitchen, this is what makes tea bitter because I have the attention span of a six-month-old black lab. Most of the time, I set the oven timer. Most of the time.
Again, take a look at the brewing instructions on the tea packet. Many teas steep for 3–5 minutes. That’s a substantial time difference, and you’ll need to experiment to find your ideal length of time. I know some tea drinkers who pour water over the leaves slowly and that’s it. Done. I, on the other hand, start experimenting with the longest recommended steeping time. It’s a matter of personal taste.

Other Reasons Tea Might Be Bitter


If you’re steeping high-quality tea leaves at the right temperature for the right amount of time, and you’re still not happy with the flavor, consider the following:
  • Water quality: Hard water and treated water (think: chlorinated) will alter the flavor of the tea. Try filtered water or bottled spring water—not mineral water, which is too hard, and not distilled water, which is too soft.
  • Water freshness: Water absorbs odors which can affect the taste. Pour or filter water just before heating.
Image shows a tea infuser on a saucer, packed with green tea leaves—too full! A bag of Queen's Blend green tea and a cup of tea sit next to it.
  • Adequate infuser space: Tea leaves unfurl and expand as they steep, releasing flavor. An infuser with limited space, like a tea ball, can become too crowded if overfilled and spoil the taste.
  • Too much tea: Seriously, this can be true. Astringency from too many leaves can overwhelm a delicate flavor. I like strong flavors, and using a heaping quantity of tea is one of my strategies, but sometimes it’s the wrong choice.
  • Microwaving: Don’t try to brew tea in a microwave. The hot and rapid temperature increase is too harsh for delicate tea leaves.
Image shows tea additives on a wooden surface—a bear-shaped bottle of honey, a brown ceramic jar of sugar, and a bag of baking soda, next to a cup of tea.

Can You Fix Bitter Tea?


To salvage a bitter cup or pot of tea, try adding sweetener: sugar, honey, agave syrup, etc. Or you might try adding a pinch of baking soda. (If the tea tastes salty, you’ve added too much.) A final trick is to add ice to dilute it and enjoy iced tea.
Image shows a glass of iced tea sitting on a wooden surface, next to a bag of Queen's Blend green tea, with a bear-shaped bottle of honey and ceramic jar of sugar in the background.

Why is My Iced Tea Bitter?


Ummm... Did you just try to salvage bitter hot tea?
In addition to all of the above, what makes iced tea bitter might be something you’re adding: sweeteners, fruit juices, extracts, something else. It seems we add more to iced teas than warm teas. Try eliminating ingredients you’ve added to identify the culprit.
At some point, you may have to conclude that a particular tea is not for you. That’s okay. Give it to a tea-loving friend and see if they feel differently. Or better yet, arrange a tea swap and turn your bitter tea into a sweet trade!

Jen Funk Weber

Jen Funk Weber writes for kids and adults about her favorite 184 things, including tea, Alaska (aka home), travel, nature, wildlife, gardening, embroidery, crafts, and puzzles (the kind you solve with a pencil). Her next book, Puzzler’s Guide to Alaska, hits shelves in spring 2021. Catch up with Jen at jenfunkweber.com.
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