Light roast: acidity-forward, fruity, origin character dominates. Medium: balanced, classic. Dark: low acidity, roast flavours dominate, chocolatey-bitter. The darker the roast, the less origin, the more roast.

What Is the Difference Between Light, Medium, and Dark Roast?

Light roast: acidity-forward, fruity, origin character dominates. Medium: balanced, classic. Dark: low acidity, roast flavours dominate, chocolatey-bitter. The darker the roast, the less origin, the more roast.

Why that matters

Roast levels are a spectrum, not a switch — but the three stages serve as useful orientation.

Light roast is finished shortly after First Crack, at a bean temperature of roughly 196–205 °C. The beans are light brown, dry (no oils on the surface), and light in weight. Flavour-wise, the bean’s own aromas dominate: fruity acids, floral notes, tea-like body. In the specialty scene, light roasting is the standard for filter coffee because it transparently showcases origin, variety, and processing. The downside: if you don’t enjoy acidity, light roast won’t make you happy.

Medium roast sits between First and Second Crack, at 210–220 °C. The beans are medium brown and dry to slightly glossy. Acidity and roast flavours are balanced — chocolate, nut, and caramel appear alongside fruit notes. This is the classic “coffee flavour” most people know. Medium roast works for both filter and espresso.

Dark roast goes to or past Second Crack, from 225 °C upward. The beans are dark brown to nearly black, often with an oily sheen. Origin aromas are largely gone — roast flavours dominate: chocolate, smoke, bitterness, caramelised sugar. Acidity is barely present. Traditional Italian espresso roasts are dark, as are French roasts.

The difference is chemically measurable: light roasts contain more chlorogenic acid (acidity) and more volatile aromatic compounds that create fruit and floral notes. Dark roasts contain more melanoidins (bitter compounds) and more oils on the surface.

At Green Wall Coffee

At our café on Sophienstraße 27 in Berlin-Lichtenberg, we roast light to medium — because we want our guests to taste the origin, not the roast. When someone orders “strong coffee” meaning a dark roast, I offer a comparison: our light-roasted espresso next to a classic dark roast. Most are surprised how much flavour the light roast delivers.

Related Questions

• Which roast suits which brewing method?
• What is espresso roast vs filter roast?
• What is First Crack and Second Crack?

More depth on this topic in the article How to Make Perfect Espresso. Or stop by at Sophienstraße 27 — Mon–Fri 8am–5pm, Sat 10am–5pm.