Strong Coffee NZ: Why Vietnamese Robusta Beats Everything Else

Most coffee sold as "strong" in NZ is still Arabica. And Arabica has a caffeine ceiling.

You've probably felt it. You order a double shot, you wait for the hit, and it just doesn't quite land the way you wanted. That's not a brewing problem. That's the bean.

The thing about Arabica

Arabica is a great coffee. Smooth, complex, loads of interesting flavour notes. But it tops out at around 1.2 to 1.5% caffeine by weight. Dark roasting it doesn't change that much. A double espresso from your local cafe is typically 80 to 120mg of caffeine. Fine for a casual morning. Not fine if you actually need to function.

Robusta is a different thing entirely

Vietnamese coffee is made with Robusta. Robusta beans carry 2.2 to 2.7% caffeine, nearly double Arabica. This isn't a brewing trick or a marketing claim. It's just how the plant works — Robusta grows at lower altitudes where pests are worse, so it evolved to produce more caffeine as a defence. A cup of our Buffalo Robusta brewed through a phin filter comes in at around 220mg. More than most energy drinks, from a single cup of real coffee.

But isn't Robusta harsh?

The cheap stuff is. Commodity Robusta, the kind in instant coffee and budget blends, often is rough and bitter. Specialty Vietnamese Robusta is completely different. Buffalo is single-origin from Vietnam's Central Highlands, sourced direct from farmers and roasted in small batches in Auckland. The flavour is bold, chocolatey, and full-bodied. It handles milk well and it doesn't bite. Vietnamese people have been drinking it for over a century for a reason.

How to brew it

The traditional way is a Vietnamese phin filter. Slow drip, concentrated, around 20g of coffee to 100ml of water. Drink it black over ice or with a spoonful of condensed milk. Either way the caffeine is real and the flavour is clean.

If brewing isn't your thing, our Condensed Milk Iced Coffee is brewed with 100% Robusta, comes in a can, and won an NZ Artisan Award. 220mg of caffeine, no effort required.

Not sure which coffee to start with? The Triplet Sampler puts all three side by side. Try Buffalo next to our Arabica and you'll understand the difference immediately.