Cook tapioca pearls in a big pan of already boiling water, give them plenty of room, and boil them for longer than fifteen minutes if you want them large and properly chewy. The longer they cook, the bigger and chewier they get. Then soak the cooked pearls in sugar syrup, honey or agave for about fifteen minutes, because boiling water leaves them bland, and get them into the glass while they are still warm. The single most useful habit is to make the pearls last, after the tea is brewed and the ice is ready, so nothing is standing about waiting for them.
What ratio of water to pearls?
Generous, rather than precise. Tapioca pearls swell considerably and they will stick to each other and to the base of the pan if they are crowded, so use a pan large enough that they can move freely in a rolling boil with room to spare. A wide pan is better than a tall narrow one.
Bring the water to a full boil before the pearls go in, not after. Pearls dropped into cool water that then heats up will dissolve at the edges and cloud the water into a starchy soup before the middles have cooked at all. Add them to boiling water, stir once so none settle on the bottom, and let the boil re-establish.
The one ratio that does need to be exact is the dough, the tapioca starch to water when you are making the pearls from scratch, and that is in the booklet. Get that wrong and the dough either crumbles or sticks to everything, which is the actual reason first attempts go astray.
How long should you boil them?
Longer than you think, and longer than fifteen minutes if you want bubbles with real presence. The relationship is simple: the longer they cook, the larger and chewier they become. A shorter boil gives smaller, firmer pearls; a longer one gives the fat, yielding bubbles most people are after.
The thing to watch for is the centre. A pearl that is cooked through is translucent all the way in, with no opaque core left in the middle. Fish one out, cut or bite it, and look. If there is a pale dot at the heart, keep going.
Test by texture as well as by clock. You are aiming for something that resists the teeth and then gives, not something that squeaks or that collapses into paste. Every batch behaves slightly differently depending on how thick you rolled them, which is why tasting beats timing.
Why should you make them in a larger batch?
Because tapioca starch is genuinely easier to handle in quantity. A small amount of dough dries out and crumbles while you are still rolling it; a slightly bigger amount stays workable long enough to finish the job. Making two glasses' worth at a time is the sweet spot, and it is how our booklet is written.
That fits neatly with how bubble tea is usually drunk anyway, which is to say rarely alone. Our Bubble Tea Kit, Boba Milk Tea makes four large glasses of Taiwanese style milk tea, iced or hot, so two batches of two covers it comfortably.
The kit also includes ready-made pearls alongside the tapioca starch, which is the answer on an evening when you want bubble tea but do not want to roll anything. Boil those to the packet's instruction and you are twenty minutes from a glass.
How do you sweeten them?
Separately from the tea, and after cooking. Pearls come out of the pan tasting of very little, so if you skip this step you get a chewy neutral lump in a sweet drink rather than part of the drink.
Drain the cooked pearls and soak them in simple sugar syrup, honey or agave for about fifteen minutes before they go into the glass. That is long enough for them to take on flavour and to stop sticking to one another, and it keeps them glossy. Brown sugar syrup is worth trying if you want something more caramelly than plain.
A quick simple syrup: bring half a cup of water to the boil, turn it down to medium, stir in a cup of white or brown sugar until it has completely dissolved, let it come back to the boil, then take it off the heat and cool it to room temperature. Any spare keeps in the fridge for several weeks, so it is worth making more than you need.
How long do cooked pearls keep?
About four hours, covered in sugar syrup, honey or agave in the fridge, and they are honestly best fresh. This is the one uncompromising thing about tapioca: it hardens as it cools and sits, and a pearl that was perfect at eight o'clock is a different object by lunchtime the next day.
So cook what you are going to drink. If you have made too many, keep them submerged in syrup rather than dry, which slows the hardening, and use them the same evening. Do not refrigerate them overnight expecting the same texture.
The made-up milk tea keeps in the fridge as it is for up to a day, so if you are prepping ahead, prep the tea rather than the pearls. Brew and chill the tea, then boil the pearls fresh when you want the drink.
Why are my pearls clear rather than black?
Because nothing has been added to colour them. Home-made tapioca pearls are naturally translucent, and the deep black of shop bubble tea comes from colouring. Our boba kit leaves colouring out, so yours will look pale amber and taste exactly as they should.
If you want the classic black look, you can add food colouring to the dough. Use slightly less water than usual when you do, so the dough consistency stays right, otherwise you will be fighting a sticky mess on the worktop.
When you want to make more later, tapioca starch is easy to find in the gluten-free section of most supermarkets, and Asian supermarkets stock loose black tea, fat straws and ready-made pearls. Every ingredient is listed on the pack; if you have an allergy question, email hello@sandyleaffarm.com before ordering.
Tapioca pearl FAQs
How long do you boil tapioca pearls for?
Longer than fifteen minutes for big, chewy pearls, since the longer they cook the larger and chewier they get. Check one through the middle: it should be translucent all the way in with no opaque core.
Why are my pearls hard in the middle?
They have not boiled long enough. Put them back in and keep testing one every few minutes until the centre is translucent rather than pale.
How do I stop tapioca pearls sticking together?
Add them to water that is already at a rolling boil, stir once, give them room in a wide pan, and soak them in syrup once drained rather than leaving them dry.
Can I make tapioca pearls in advance?
Not really. Cooked pearls last about four hours covered in sugar syrup in the fridge and are best fresh, so brew the tea ahead instead and boil the pearls at the last minute.
Are tapioca pearls vegan?
The pearls in our kits are vegan. Whether the finished drink is depends on the milk you choose, and coconut, soya, almond, oat, rice and hemp all work.
Fancy a proper glass of boba at home? Have a look at our bubble tea kits.
