Bubble Tea: Taiwan's Tapioca Pearl Drink, How the Pearls Are Made, and Why the Straw Is Fat

Bubble tea was invented in Taiwan in the 1980s — the two most frequently cited origin stories involve a Chun Shui Tang tea house in Taichung and a Hanlin Tea Room in Tainan, both claiming to have first combined tapioca pearls with tea around 1986–1988. The true origin is contested, both establishments maintain their claim, and Taiwan courts have settled some disputes while others remain.

What is not contested: bubble tea went from a Taiwanese street drink to a global phenomenon in roughly 30 years. By the 2010s, bubble tea chains had opened on every continent, and the drink had become so widespread that even non-Asian countries had developed local adaptations.

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What "Bubble" Means

The name "bubble tea" has two possible referents, and both may be relevant:

1. The foam: The original preparation involved vigorously shaking tea with ice and milk (in a cocktail shaker), which produced a layer of foam bubbles on top. This foam was the original "bubble."

2. The pearls: The tapioca pearls at the bottom of the cup are also called "bubbles" (珍珠, zhēnzhū, pearls in Mandarin, but "bubbles" in some Taiwanese Hokkien usage).

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The Tapioca Pearls (Boba)

Tapioca pearls are made from tapioca starch — the processed starch of the cassava root (Manihot esculenta). The cassava root is grated, pressed, dried, and processed into a white starch powder.

What makes them chewy: Tapioca starch is almost entirely amylopectin (a branched starch polymer), with very little amylose. When cooked, the amylopectin forms a dense, elastic network that produces the characteristic chewy, springy texture — similar to what makes mochi and certain Korean rice cakes (tteok) chewy.

Colors: Classic black boba pearls get their color from brown sugar (often) or from dark caramel coloring mixed into the dough. Clear/white pearls are uncolored. Colored pearls (green, pink, multicolored) use additional coloring.

Making pearls at home:

1. Mix 100g tapioca starch + 2 tablespoons brown sugar + 50ml hot water
2. Knead into a dough; the dough should be smooth and pliable but not sticky
3. Roll into small balls (1cm diameter)
4. Boil in a large pot of water 15–20 minutes until translucent and chewy throughout
5. Drain; immediately toss with a small amount of brown sugar syrup to prevent sticking

Store-bought uncooked boba pearls are available at Asian grocery stores and require only cooking.

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Classic Bubble Tea (Pearl Milk Tea)

The original Taiwanese version:

• Tea: Strong-brewed black tea, cooled
• Milk: Creamer or evaporated milk (the original; many modern versions use fresh milk or oat milk)
• Sugar syrup: Dissolved sugar, added to individual preference
• Ice: Blended or cubed
• Pearls: Black or clear tapioca pearls

The shaking: Tea, milk, sugar, and ice are combined in a cocktail shaker and shaken vigorously. The shaking aerates and chills the mixture. Pearls are added to the cup separately.

The straw: The fat straw (1–1.2cm diameter) is essential — tapioca pearls do not fit through a standard drinking straw. The wide straw allows each sip to include both liquid and pearls.

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Modern Types

Brown Sugar Milk Tea (黑糖珍珠鮮奶)

Fresh milk poured over tiger-striped brown sugar syrup streaks on the cup wall, with warm brown sugar pearls. No blending — served over ice with the brown sugar syrup slowly dissolving. One of the most popular modern variants.

Taro Milk Tea

Made with taro powder or fresh taro, giving a distinctive purple color and a slightly starchy, sweet flavor. Often mixed with milk tea base.

Matcha Milk Tea

Ceremonial grade matcha dissolved in hot water and mixed with milk and sugar syrup. Usually less sweet than black tea versions.

Fruit Tea (水果茶)

Green or white tea blended with fresh or concentrated fruit juice — passion fruit, mango, strawberry, lemon, lychee. Usually served without milk; often with fruit pieces or fruit jelly instead of tapioca pearls.

Cheese Tea (芝士奶蓋)

Originated in China (not Taiwan) in the mid-2010s: a layer of lightly salted cream cheese foam floated on top of cold tea. Drunk from the side without a straw to get both the foam and the tea.

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The Complete Classic Pearl Milk Tea Recipe

Serves: 2

For the pearls:

• 200g ready-to-cook tapioca pearls (black boba)
• Brown sugar syrup: 4 tablespoons dark brown sugar + 4 tablespoons water, simmered 3 minutes

Cook pearls per package instructions (typically 15–20 minutes in boiling water). Drain; toss with brown sugar syrup.

For the tea:

• 600ml strongly brewed black tea (Assam or generic black tea, cooled completely)
• 100ml evaporated milk or whole milk (or oat milk)
• 4 tablespoons simple syrup (1:1 sugar and water) — adjust to taste

Assembly:

1. Add cooked pearls to two tall glasses (half the pearls per glass).
2. Fill glasses with ice.
3. Combine cold tea, milk, and simple syrup in a cocktail shaker with ice.
4. Shake vigorously 30 seconds.
5. Pour over the pearls and ice.
6. Serve with wide boba straws.

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Sugar Level and Ice Level

Every established bubble tea shop in Taiwan and most worldwide offer customization:

• Sugar level: 0%, 25%, 50%, 75%, 100% (standard), 120% (extra sweet)
• Ice level: No ice, light ice, regular ice, extra ice

The customization culture is part of what made bubble tea so commercially successful — individual preferences are accommodated precisely.

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Related reading: Cendol Malaysian Shaved Ice Dessert Guide | Taiwanese Beef Noodle Soup Guide | Lu Rou Fan Taiwanese Braised Pork Rice Guide