Yerba mate is brewed by steeping dried leaves in hot (not boiling) water and sipping through a filtered metal straw called a bombilla. You can prepare it in a traditional gourd, a French press, or even as a cold drink. The method you choose affects the flavor and strength, but the core principle stays the same: keep the water well below boiling to avoid a bitter, scorched taste.
Water Temperature Is Everything
The single most important rule for brewing yerba mate is to never use boiling water. Water between 70 and 80°C (158 to 176°F) extracts the flavor and beneficial compounds without turning the drink harsh and bitter. If you don’t have a thermometer, bring your kettle to a boil and let it sit for three to five minutes before pouring. This lands you in the right range.
Boiling water doesn’t just ruin the taste. It breaks down the antioxidant compounds, particularly the chlorogenic acids and other polyphenols, that make yerba mate nutritionally interesting in the first place. Think of it like green tea: too hot, and you lose what makes it worth drinking.
The Traditional Gourd Method
In South America, mate is prepared in a hollowed-out gourd (called a mate or calabash) and sipped through a bombilla, a metal straw with a built-in filter at the bottom that keeps leaf particles out of your mouth. Here’s how to do it:
- Fill the gourd about two-thirds full with loose yerba mate leaves. This is more leaf than you’d use for regular tea, and that’s intentional. The high leaf-to-water ratio gives mate its characteristic strength.
- Tilt and shake gently. Cover the opening with your palm, turn the gourd on its side, and give it a few soft shakes. This moves the finer dust toward the top so it doesn’t clog the bombilla.
- Insert the bombilla at an angle, resting it against the inner wall of the gourd. Press it down gently into the leaves. Once it’s in, don’t move it.
- Pour hot water (70 to 80°C) into the space near the bombilla, wetting the leaves gradually rather than flooding the whole gourd at once. You’re only filling the gourd, not submerging it like a teapot.
- Sip and refill. Drink the water through the bombilla until you hear air, then pour more hot water in. A single fill of leaves can handle 10 to 20 refills before the flavor fades.
An alternative approach is to put the bombilla in first, then add the leaves, then pour water. Both methods work. The key is keeping the bombilla stationary once it’s placed so it doesn’t lose its seal against the leaves.
Curing a New Gourd
If you buy a natural calabash gourd (as opposed to ceramic or stainless steel), you need to cure it before first use. Scrape out any loose debris or seeds with a spoon, rinse with warm water (no soap), and fill it with used or moistened yerba mate leaves. Let them sit for a few hours. The leaves should be damp, not swimming in water, because soaking can split the gourd. Some people add a splash of alcohol to disinfect. After curing, dump the leaves and your gourd is ready. This process prevents cracking and actually improves the flavor over time as the gourd absorbs the mate.
Brewing Without a Gourd
You don’t need traditional equipment to make good yerba mate. A French press works well: add a few tablespoons of loose leaves, pour in water at 70 to 80°C, and let it steep for three to five minutes before pressing. Start with a shorter steep if you prefer a milder flavor, and adjust from there.
A standard tea infuser or strainer basket also does the job. Use a generous amount of leaves compared to what you’d use for regular tea, since yerba mate is meant to be brewed strong. You can steep the same leaves multiple times, just like with the gourd method, though a French press won’t get quite as many rounds as a traditional setup.
Tereré: The Cold Version
In Paraguay and parts of Brazil, mate is served ice-cold as tereré, and it’s perfect for warm weather. Fill a glass or cup about halfway with yerba mate leaves. In a separate pitcher, combine cold water with plenty of ice and slices of citrus (lemon, orange, or grapefruit). Pour the cold citrus water generously over the leaves, soak them completely, and let everything steep for a couple of minutes before inserting your bombilla.
Tereré is more forgiving than hot mate. You can add fresh mint, squeeze in some lemon juice, or sweeten the water. Some people use natural fruit juice instead of plain water. Ceramic, glass, or stainless steel vessels keep tereré colder than a natural gourd would.
How Much Caffeine You’re Getting
A standard 150 mL cup of yerba mate contains roughly 80 mg of caffeine, comparable to a cup of coffee. The difference is that mate also contains theobromine (the compound in chocolate that produces a mild, sustained energy lift), so many drinkers describe the effect as alert but smooth, without the jittery peak and crash of coffee.
Because traditional mate involves refilling the same leaves repeatedly, your first few sips are the strongest. By the tenth refill, you’re getting considerably less caffeine per round. If you’re sensitive to caffeine, those later refills are gentler.
Mate Circle Etiquette
Mate is traditionally a social drink, passed around a group in a ritual with a few simple rules. One person, called the cebador (the brewer), prepares the gourd, takes the first sip to make sure the flavor is right, then refills it with water and passes it to the next person. After drinking, you hand the gourd back to the cebador for a refill before it goes to the next person in the circle.
The gourd always moves clockwise. Never stir or reposition the bombilla, since that disrupts the leaf arrangement and can clog the straw. And here’s the one that catches newcomers off guard: saying “thank you” (gracias) is how you signal that you’re done and don’t want any more. If you say it after your first round, you’ve politely opted out. Just hand the gourd back silently if you want to keep going.
What to Know About Daily Use
Yerba mate is rich in polyphenols, the same category of antioxidant compounds found in green tea and berries. Mate from different regions varies in concentration. Uruguayan preparations, for instance, have been measured at roughly 1,450 mg of polyphenols per 100 mL, while Brazilian versions come in around 600 mg. The leaves also contain saponins, which have anti-inflammatory properties.
On the safety side, there are two things worth knowing. First, most commercial yerba mate is smoke-dried during processing, which introduces polycyclic aromatic hydrocarbons (PAHs), compounds also found in grilled meat and cigarette smoke. Smoke-dried samples contain nearly three times the PAH levels of unsmoked varieties. If this concerns you, look for brands labeled “air-dried” or “unsmoked,” which are increasingly available.
Second, drinking very hot beverages of any kind is associated with a higher risk of esophageal cancer. This isn’t unique to mate, but it’s relevant because traditional preparation encourages sipping at high temperatures. Letting your water cool to the recommended 70 to 80°C range addresses both the flavor and safety concern at once. Heavy consumption in the range of one to two liters per day over many years has been linked to increased cancer risk in some studies, though moderate intake appears far less concerning.