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 is
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.
In practice at Green Wall Coffee
At our café on Sophienstraße 27 in Berlin-Lichtenberg, we serve light to medium roasts — because we want our guests to taste the origin, not the roast. Anyone looking for "strong coffee" often means a dark roast — yet lighter roasts usually carry more flavour, just a different kind.
Stop by Sophienstraße 27 in Berlin-Lichtenberg — Mon–Fri 8am–5pm, Sat 10am–5pm.
Further reading
Related questions:
- Which roast level suits which brewing method?
- What Is the Difference Between Drum Roasting and Hot-Air Roasting?
- Why Does Industrial Coffee Often Taste Bitter?
Also relevant:
- Which beans are best for cold brew? — Cold Brew & Iced Coffee
- Which beans are best for filter coffee? — Filter Coffee & Pour-Over
All questions in this topic: Roasting & Roast Levels