Coffea canephora, the other species people actually drink, and roughly 40 % of world production. It grows at low altitude, tolerates heat and disease that would kill arabica, yields more per tree, and costs far less. Vietnam is the largest producer on earth on the back of it.
What it tastes like
Heavier, flatter, more bitter. Woody, grainy, rubbery, sometimes peanut. Acidity is minimal and aromatic complexity is limited — it has about half the sugar and a fraction of the lipids arabica carries, and roughly twice the caffeine, which is bitter on its own.
It also produces thicker, more persistent crema under pressure, which is exactly why Italian espresso blends have used it for a century and why a traditional bar shot in Naples looks and tastes the way it does.
The honest part
Robusta's reputation is mostly deserved and partly unfair. Most of it is grown as a commodity, harvested unripe by machine, and processed without care — and that's what people have tasted. Fine robusta exists: selectively picked, properly processed, cupped and scored on its own scale. It is still not going to give you jasmine, but it is a real category and it's improving.
Climate change is quietly making this argument for us. Robusta grows where arabica increasingly can't.
When you'll meet it
- Supermarket blends, usually undeclared. If a bag doesn't say what's in it, assume some.
- Italian espresso blends, declared and deliberate — for body, crema and price.
- Vietnamese coffee, where the phin and sweetened condensed milk are built around exactly this profile.
If you brew it
Treat it as you would a dark roast, because it behaves like one: it extracts faster and turns bitter sooner. Coarser grind, cooler water — 85–90 °C — shorter contact. A recipe written for a light arabica will pull it well past pleasant.
Don't try to make it taste like arabica. Brew it for what it's good at: body, punch, and holding its own against milk and sugar.