Star anise is a star-shaped spice harvested from the fruit of an evergreen tree native to southern China and northeast Vietnam. Its warm, sweet licorice flavor comes almost entirely from a single aromatic compound that makes up 72 to 92 percent of the spice’s essential oil. If you’ve tasted Vietnamese pho, Chinese five-spice powder, or Indian biryani, you’ve tasted star anise.
The Tree and the Fruit
The star anise tree (Illicium verum) grows up to 15 meters tall with white bark and stays green year-round. It’s cultivated primarily in the Guangxi province of southern China and in northern Vietnam, where the climate suits its tropical preferences. The spice itself comes from the tree’s fruit: a hard, reddish-brown pod with six to eight pointed segments arranged in a distinctive star shape, each holding a single glossy seed.
After harvest, the fruit is dried before it reaches your spice rack. Traditional sun drying takes four to five days. Producers sometimes blanch the pods in hot water for a few minutes first, which cuts drying time to about three days and helps preserve color. Modern operations use electric or heat pump drying rooms for more consistent results.
What Gives It That Flavor
The licorice taste of star anise comes from a compound called trans-anethole, which accounts for the vast majority of its essential oil. The same compound gives regular anise seed and fennel their similar flavors, which is why all three spices can sometimes stand in for one another in recipes. Smaller amounts of other aromatic compounds round out the profile, contributing subtle herbaceous and slightly sweet notes that make star anise smell as complex as it tastes.
Star Anise vs. Anise Seed
Despite sharing a name and a similar flavor, star anise and anise seed are completely unrelated plants. Anise seed comes from a small herb in the parsley family, native to the Mediterranean. Star anise comes from a tree in an entirely different plant family, native to China. The flavor difference is noticeable: anise seed is more potent and slightly spicy, while star anise is milder and sweeter. In cooking, anise seed is typically used as small seeds or ground powder, while star anise is used as whole pods that you can fish out of a dish before serving.
How It’s Used in Cooking
Star anise is one of the five ingredients in Chinese five-spice powder, alongside cinnamon, cloves, Sichuan pepper, and fennel seeds. It’s essential in Vietnamese pho, where whole pods simmer in the broth for hours alongside charred ginger and onion. In parts of India, it appears in biryani and masala chai, adding a warm depth that balances cardamom and cinnamon.
Beyond savory cooking, star anise works in baked goods, poached fruit, and mulled wine. A single pod goes a long way. Most recipes call for one or two whole stars, simmered in liquid and removed before serving. If you’re using ground star anise, start with a quarter teaspoon and adjust from there, since the concentrated powder delivers flavor more quickly.
Health Properties
Star anise has a long history in traditional medicine, and modern research has identified several properties that support its reputation. The spice contains significant levels of phenolic compounds and flavonoids, both of which act as antioxidants. Lab studies have documented antimicrobial, antifungal, and anti-inflammatory activity in star anise extracts.
Its most notable pharmaceutical contribution involves a compound called shikimic acid, which is a key building block in the production of the antiviral drug oseltamivir (sold as Tamiflu). Much of the world’s supply of shikimic acid has historically been sourced from Chinese star anise, making the spice an unexpectedly important player in influenza treatment.
That said, most of the antimicrobial and anticancer research on star anise has been conducted in lab settings, not in human clinical trials. Drinking star anise tea or cooking with the spice delivers antioxidants and flavor, but it’s not a substitute for medical treatment.
The Toxic Lookalike
One important safety concern involves Japanese star anise (Illicium anisatum), a closely related species that is toxic. Japanese star anise contains potent neurotoxins called anisatins, which block a key calming signal in the nervous system and can cause seizures, vomiting, and other serious neurological symptoms. The two species look very similar, and multiple poisoning cases have been traced to products where the toxic Japanese variety was mixed in with the edible Chinese one.
If you’re buying star anise, purchase it from reputable spice retailers rather than foraging or buying from unverified sources. The Chinese species (Illicium verum) is the only one considered safe for consumption.
Storing Star Anise
Whole star anise pods are remarkably shelf-stable. Their tough, woody texture protects the essential oils inside, keeping the spice flavorful for up to three years when stored properly. Ground star anise loses potency much faster, lasting about 12 months before the flavor fades noticeably. The increased surface area of the powder lets it oxidize more quickly.
For either form, store star anise in an airtight container made from nonporous material, kept in a cool, dark spot like a pantry. Heat, light, and moisture are the enemies. If your whole pods have lost their strong licorice scent when you hold one close and sniff, they’re past their prime.