From boba tea to caviar: The rise of pearl-shaped food trends in modern cuisine

Food trends highlight pearl-shaped items like caviar, finger limes, and boba, adding playful textures and flavours to culinary experiences worldwide.

Some food trends have deep roots, some are fleeting, some are outright silly, and some are just plain fun. I am putting the “just plain fun” label on this one: pearl-shaped foods that pop in your mouth. Tiny sphere-shaped foods seem to be everywhere, entertaining mouths with their pop-ability and the sometimes unusual transformation of familiar foods. Call it part of a bubble moment: The bubble hem is hot in fashion, and the decor loves soft, round corners and playfulness.

Here are some examples of pearl-shaped foods, old and new.

Straight from nature

Some pearl-shaped bubble foods have been with us for a long time — not fads at all. Perhaps the classic is caviar, and fish eggs in general. Different fish eggs have different types of “pop” and different flavor profiles. Fish roe is great on blinis, toast point and potato pancakes, but also eggs, shellfish and pasta.

Not all caviar is pricy, either. California-based Tsar Nicoulai, for example, offers gold pearl trout roe for about $14 an ounce; it's bright orange with a firm shell and a silky, distinctive pop. Their Estate Malossol Caviar retails for about $100 an ounce; it has a softer texture, a brownish-black colour and a buttery, earthy flavour.

Could it be time for the finger lime?

Another natural, pearl-shaped product — one not so well-known — is the finger lime. It looks like a skinny, pinky-shaped lime, but inside are wonderful little crunchy caviar-like pearls of lime juice. It’s definitely a novelty but not a gimmick: The flavour and texture are a terrific addition to anything from oysters to scallop ceviche.

The skin of finger limes can be green, burgundy or dull orange. The pulpy pearls can be green, pale peach or red. To harvest a finger lime’s caviar, just slice the lime down the middle and then squeeze each half. If your finger lime is fresh, the caviar should spill out easily. Look for them at speciality stores or online.

Boba and boba tea

Boba and boba tea (also known as bubble tea) have been around since the 1980s, introduced in Taiwan and now taking the world by storm. Boba pearls are usually made from tapioca starch (from the cassava plant), water, and sometimes a sweetener, like brown sugar, using a process known as gelatinization.

The little boba balls are chewy and bouncy, and while they are most often served in a sweet cold tea, they can also be used in different preparations. There is also popping boba, designed to burst when you bite into it. Boba tea is usually sweet and creamy, shaken before serving to create a frothy texture. A fat straw is used to slurp up the balls, which are chewed as you drink.

You can buy boba tea at coffee shops and speciality stores and get packaged boba pearls to make drinks and other confections at home. Twrl Milk Tea, for example, makes boba offerings like Lychee Popping Boba and Brown Sugar Boba. You can also buy ready-to-drink boba tea in a can or bubble tea kits.

Spherification: Making foods pop-able

A trend that's been percolating for years is spherified foods — liquids that become squishy little orbs when a gelled membrane is created around them.

One of my favourites is balsamic and other vinegar pearls. De Nigris, for instance, makes a line of Italian balsamic vinegar pearls, including some flavoured with truffle and orange. Messino makes balsamic pearls and also lemon pearls, filled with real lemon juice, and pomegranate pearls. Tartuflanghe turns truffle juice into truffle pearls, and also makes anchovy and pesto pearls.

Prova’s vanilla, coffee and cocoa pearls are made for pastry chefs to serve on desserts. You might sprinkle balsamic pearls on crostini or bruschetta, salads, and burrata or other cheeses. Try lemon pearls on top of oysters or grilled fish. Pomegranate pearls can be served on yogurt, tarts and cocktails — as can the pomegranate’s natural pearls, the jelly-like arils that cover some seeds.

Spherification, or reverse spherification as it is officially called, uses sodium alginate and calcium to create the little orbs. The technique was invented in the 1940s and popularized by chef Ferran Adraia in the 2000s at his famed, now-closed restaurant El Bulli, in Spain. Chefs like Wylie Dufresne at WD-50 in New York have helped bring it to the fore.

Spherification beyond liquids

Some restaurants spherify their own foods, from ravioli to melons. Olive lovers might be dazzled by the spherified olives at Jose Andres’ Mercado Little Spain in NYC.

BelGiosioso makes teeny little mozzarella pearls, weighing in at 2.5 grams each. They look adorable in pasta salads and antipasti platters. They also melt into perfect little cheesy pockets in baked pastas, like baked ziti.

Easter candy, too

On the sweet side, there are translucent hard-candy rabbits stuffed with candy pearls from Pure Sugar. You’ll have to steel yourself to smash them open or just shake the pearls out from the bottom if you can’t bear to break the bunny.