Coffee Roast Levels Explained: Light, Medium and Dark

Green coffee beans taste like nothing much. Roasting is where the flavour happens. The same bean roasted light or dark produces two completely different cups, so knowing the roast levels helps you buy coffee you'll actually enjoy.

Light roast

Roasted just to the first crack, the point where beans pop like popcorn. Light brown, dry surface, sharp acidity.

Light roasts keep the most origin character. Expect bright acidity, floral and fruity notes, and a light, tea-like body. This is the roast specialty Arabica drinkers chase when they want to taste exactly where a bean came from.

Medium roast

Past the first crack, with more time for caramelisation. The acidity softens, the body fills out, and you get balance: some origin character, some sweetness, a bit of nuttiness. Most supermarket and cafe coffee in NZ sits here. It's the crowd-pleaser zone.

Medium-dark roast

Into the edge of the second crack. Bolder flavours take over: rich caramel sweetness, chocolate notes, a fuller and rounder body, with acidity mostly in the background. A hint of origin character survives, but the roast is now doing a lot of the talking.

Dark roast

Through the second crack. The beans turn very dark and oily. Acidity nearly disappears, bitterness steps forward, and the flavour goes smoky, earthy and heavy. This is what most people mean by "strong tasting" coffee, though roast level doesn't change caffeine much. Strength in flavour and strength in caffeine are different things, which we cover in our caffeine guide.

Very dark roast

Sometimes called Italian or Spanish roast. Taken to the brink. Almost no acidity, a heavy syrupy body, and intense smoky, burnt flavours with a long finish. A niche taste, mostly used in traditional espresso blends.

Where Vietnamese coffee sits

Vietnamese coffee is traditionally roasted medium-dark to dark. Robusta's natural boldness and chocolate character suit a darker roast, and the style evolved alongside the phin filter and condensed milk, both of which pair best with a big, rich cup that holds its own.

Our Buffalo Robusta is roasted dark in small batches in Auckland: bold and chocolatey without tipping into burnt. Our Sunshine Arabica is roasted lighter to keep its smooth, delicate character. Try them side by side with The Triplet Sampler and you'll taste exactly what roast level does to a cup.