Bubble tea - tapioca balls in drinks
Photo by makidotvn/Deposit Photos

What are those chewy balls in the bottom of bubble tea?

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What exactly are those chewy little balls in the bottom of cups of bubble tea or Thai iced tea? Since they sort of look like plastic, you might also wonder: Are they okay to eat?

Here, get the scoop on those deliciously squishy little boba pearls in the bottom of your bubble tea.
Tea Thai-me

Thai iced tea, bubble tea, pearl milk tea, boba tea — whatever you call it, it’s delicious and refreshing. But baffling many people are those chewy little balls at the bottom of the cup.

They don’t usually have much of a flavor of their own — apart from a bit of sweetness — yet for some reason, you can’t help but slurp them up through the oversized straw and chew ‘em up. But what are they?

And the mystery ingredient is…

They’re tapioca pearls — most commonly, black tapioca pearls. Yes, the little chewy bits at the bottom of your tea are essentially the same thing used to make that classic dessert, tapioca pudding. And tapioca? It’s simply a starch extracted from the root of the cassava plant.

When the boba pearls are cooked correctly — just boiled for a bit, and then cooled and maybe flavored with some sugared flavoring or syrup — you end up with a little sphere about a half-inch in diameter with the texture of a gumdrop or gummy bear and a slick, almost slimy, feel.

The black pearls look like this before cooking:

Black Taiwanese boba - Tapioca bubble tea balls
Black Taiwanese boba balls – Photo by motghnit/Envato

They’re not added only to teas, but also may show up in coffee-based drinks, chocolate and cocoa, and even fruity smoothies.

How are the various types of coffee different?

Pearl tea was invented in Taiwan. According to one story, years ago, a Taiwanese tea vendor outside of a school added the little boba balls to his shaken teas to make his drinks stand out to the students. Apparently, it worked.

The boba pearls don’t really serve much of a purpose in the tea, other than to add a texture, some bite, a slight flavor, and a little fun to be enjoyed along with the drink. (Well, okay, they look cool on Instagram, too.)

Big boba business

Strange? Maybe. But those little boba balls in bubble tea beverages are a brilliantly big business.

According to a 2019 report published by Allied Market Research, the global bubble tea market was valued at $1.9 billion in 2016, and projected that it will grow to $3.2 billion by 2023.

And where are boba beverages most popular? The North American bubble tea accounted for more than 57% of the global market in 2016 — and the United States accounted for more than 97% of that North American market.

What are the chewy balls in bubble tea

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