What is boba made of? Classic boba pearls are made of tapioca starch, from the root of the cassava plant, mixed with water and usually a sweetener such as brown sugar. The dough is rolled into balls, boiled until chewy and served in bubble tea. Prefer a boba you can hug? Browse our bubble tea plush collection.
Key takeaways
- Classic boba, also called tapioca pearls, is made from tapioca starch, water and a sweetener.
- Tapioca is a starch obtained from the tuberous roots of cassava (Manihot esculenta), a plant native to tropical America (CAMEO, Museum of Fine Arts, Boston).
- Raw cassava contains cyanide and is eaten only after leaching and drying (University of Minnesota Duluth).
- Popping boba is different: it is a thin gel skin made with sodium alginate, an extract of brown algae, set in a calcium bath around a juice center (University of Delaware).
- Pearl milk tea comes from Taiwan, where two teahouses claim to have invented it in 1986 and 1987 (Taipei Times).
What are boba pearls made of?
Boba pearls are made of tapioca starch, water and sugar. The starch gives them their chewy, bouncy bite, and the sugar or syrup gives them their sweet taste and dark color.
A basic batch of pearls needs only a few ingredients:
- Tapioca starch (or tapioca flour): the main ingredient and the source of the chewy texture.
- Hot water: it partly cooks the starch so the mixture turns into a dough that can be shaped.
- A sweetener: brown sugar, molasses or another syrup. Dark pearls are usually colored this way, and some commercial pearls also use food coloring.
After cooking, the pearls are typically soaked in a sugar syrup. This keeps them soft and adds flavor before they are spooned into a cup of tea. Commercial dry or quick-cook pearls can contain other ingredients, such as added starches, so the package label is the best guide to what a specific brand of pearls contains.
What is tapioca, and where does it come from?
Tapioca is a starch made from the root of the cassava plant. It is not a grain or a seed, and on its own it contains no dairy.
CAMEO, the materials database of the Museum of Fine Arts, Boston, defines cassava starch as a beady starch obtained from the tuberous roots of the cassava plant, Manihot esculenta, native to tropical America. To get the starch, the roots are washed, dried and ground into a powder. CAMEO notes that this starch is the main one used in Latin America and that it also serves outside the kitchen, as laundry starch and as an adhesive for stamps, envelopes and labels.
Cassava goes by several names. The same CAMEO entry lists manioc, mandioca and Brazilian arrowroot. The University of Minnesota Duluth's food anthropology pages explain that the word cassava comes from the Taino casavi, meaning "flour from manioc," and that the word tapioca traces back to Tupi, a language of Brazil.
Is tapioca safe to eat?
Tapioca sold as food is processed cassava starch. Raw cassava root is a different story: it naturally contains cyanide and must be processed before anyone eats it.
The University of Minnesota Duluth notes that cassava is eaten as a staple food in the tropics only after leaching and drying to remove cyanide. That is why you should never try to make boba from raw cassava root at home. Buy tapioca starch or ready-made pearls from a food store instead, and follow the cooking directions on the package.
Fully cooked pearls are also chewy and need to be chewed well. If you have questions about boba for a young child or for someone with swallowing difficulties, ask a pediatrician or a doctor first.
How are boba pearls made?
Boba pearls are made by turning tapioca starch into a dough with hot water, rolling it into small balls, then boiling the balls until they are soft and translucent.
Here is the general process, whether in a home kitchen or in a factory:
- Heat the liquid. Water and sweetener are brought to a boil.
- Make the dough. Tapioca starch is mixed in while the liquid is hot.
- Shape the pearls. The dough is rolled into ropes, cut into small pieces and rolled into balls. Factories do this step with machines.
- Dry or freeze. Commercial pearls are dried or frozen so they keep until they are cooked.
- Boil. The pearls are boiled until they are chewy all the way through.
- Soak in syrup. Cooked pearls are rinsed and kept in a sugar syrup until they are served.
Cooking times differ from one product to the next, so follow the directions on the package of the pearls you buy.
Is boba healthy?
Boba is a sweet treat rather than a health food. Tapioca pearls are made of starch and sugar, so they are mainly a source of carbohydrate, and the drink around them often adds more sugar.
How much a cup of bubble tea adds to your day depends on what you order: the size of the cup, the amount of syrup, the type of milk or creamer and the number of toppings. Many shops let you choose a lower sweetness level, a smaller size or fewer pearls. Nutrition facts vary from shop to shop and from product to product, so check the label or ask the shop if you track sugar or calories. If you have diabetes or another condition that affects your diet, talk to your doctor or a registered dietitian about how boba fits into your meals.
What are the different types of boba?
The word boba usually means chewy tapioca pearls, but bubble tea shops also serve popping boba, clear pearls and jelly toppings, and each one is made from different ingredients.
Use this table to tell the most common toppings apart:
| Type | Main ingredients | Texture |
|---|---|---|
| Black or brown tapioca pearls | Tapioca starch, water, brown sugar or other dark sweetener (sometimes food coloring) | Chewy, bouncy, sweet |
| White or clear tapioca pearls | Tapioca starch and water, with little or no dark sweetener | Chewy, milder taste |
| Mini pearls | Same as regular tapioca pearls, in a smaller size | Chewy, smaller bite |
| Popping boba | Fruit juice or flavored liquid inside a skin made with sodium alginate and calcium | Thin skin that bursts with juice |
| Jelly toppings | Gelled sweet liquid, cut into cubes or strips (gelling agents vary by product) | Soft, slippery |
What is popping boba made of?
Popping boba is made of a flavored liquid, often fruit juice, wrapped in a thin gel skin. It contains no tapioca, which is why it bursts instead of chewing.
The University of Delaware's K-12 engineering program describes popping boba as cross-linked spheres with a thin, gel-like skin and juice inside that bursts when squeezed. The skin forms through a technique chefs call spherification:
- Sodium alginate, a polysaccharide extracted from brown algae, is added to a flavored liquid.
- Drops of that liquid fall into a bath of calcium chloride.
- The calcium replaces the sodium ions and links the alginate chains together, so a gel skin forms around each drop.
Scientists call this reaction cross-linking. It is the same chemistry used in molecular gastronomy to make "caviar" spheres out of sauces and juices.
Where does boba come from?
Pearl milk tea, the drink that made boba famous, comes from Taiwan in the 1980s. Its exact inventor is still disputed.
According to the Taipei Times, two Taiwanese teahouse chains claim the idea. A teahouse in Tainan says its founder came up with it in 1986 after buying white tapioca balls at a local market and adding them to milk tea. A teahouse in Taichung says one of its employees created the drink in 1987 by mixing tapioca balls into iced milk tea. The two companies ended up filing lawsuits against each other.
The paper adds that neither company was able to patent or trademark the drink, so pearl milk tea spread to teahouse menus across Taiwan by the mid-1990s. From there, it traveled around the world, and the chewy pearls became the drink's signature.
Why is it called boba?
Boba is simply the popular name for the pearls in bubble tea, and in much of the United States it has become a name for the whole drink.
In Taiwan, the classic drink is known as pearl milk tea, after the round tapioca pearls. In the US, people say "boba," "boba tea" or "bubble tea," often for the same drink. The "bubble" in bubble tea is usually linked to the foam that forms when the tea is shaken, not only to the pearls themselves, which is why you can order bubble tea with or without boba.
Read also: Llama vs Alpaca: How to Tell Them Apart, another quick guide that answers a question people love to ask.
Bring home a bubble tea plush
Love boba but not the sugar rush? A plush version never melts, never spills and stays cute on a bed or a desk. Here are three picks from Mister Plush that are in stock now:
- Boba Bubble Tea Plush: a bright red 11.8-inch cup of boba filled with 100% PP cotton, sized for a shelf or a nightstand.
- Kawaii Bubble Tea Plush: a chubby green boba cup in four sizes, from a 7.9-inch desk buddy to a 25.6-inch snuggle pillow.
- Big Bubble Tea Plush: an oversized brown boba cup in 19.7 or 27.6 inches, with open eyes, sleepy closed eyes or an ice cream topping.
Looking for more cute companions? Explore our kawaii plush collection.
FAQ: what is boba made of
Is boba made of tapioca?
Yes. Classic boba pearls are made of tapioca starch, which comes from the root of the cassava plant, combined with water and usually a sweetener. Popping boba is the exception: it has no tapioca and is made of a flavored liquid inside a thin gel skin of sodium alginate set with calcium, as the University of Delaware explains.
Is boba gluten-free?
Tapioca starch comes from cassava, a root, not from wheat, barley or rye, so pure tapioca pearls contain no gluten-bearing grain. Ready-made pearls and bubble tea drinks can include other ingredients, though, and may be prepared alongside foods that do contain gluten. If you need to avoid gluten, read the label and ask the shop before ordering.
Is boba vegan?
Classic tapioca pearls are usually plant-based, since they are made of tapioca starch, water and sugar. The drink around them is another matter: milk tea often contains dairy milk or a creamer, and some toppings use other ingredients. If you eat vegan, ask for a plant-based milk and check the ingredients of the pearls and toppings.
Does boba have caffeine?
Tapioca pearls are made of starch, water and sugar, so the pearls themselves are not a source of caffeine. The caffeine in a cup of bubble tea comes from the tea or coffee base. If you want to avoid caffeine, ask for a caffeine-free base, such as a fruit drink or a milk drink without tea.
Why are some boba pearls black?
Dark boba pearls usually get their color from brown sugar, molasses or another dark sweetener added to the dough or the soaking syrup, and some commercial pearls also contain food coloring. White or clear pearls are made with little or no dark sweetener, so they look translucent and taste milder.
Conclusion
What is boba made of? Mostly tapioca starch from the cassava root, plus water and sugar, shaped into pearls and boiled until chewy. Popping boba swaps the starch for a juice-filled alginate skin. Want a cup of boba that lasts forever? Shop our bubble tea plush collection.
Sources
- CAMEO, Museum of Fine Arts, Boston: Cassava starch
- University of Minnesota Duluth, Anthropology of Food: Cassava
- University of Delaware, K-12 Engineering: Hydrogels in the Kitchen? Hydrogels in the Body?
- Taipei Times: Who invented bubble tea?
