10 September 2026 · 4 min read
roast level is the simplest word on the bag and the most misunderstood. «dark» doesn't mean «strong», and «light» doesn't mean «weak». strength is set by the brew recipe (how much coffee and how much water); the roast level decides just one thing: which side of the bean's character you'll hear.
what's actually happening during roasting
during roasting, maillard reactions and caramelisation take place inside the bean: sugars and acids transform, hundreds of aromatic compounds are born, the bean loses moisture and weight and cracks (first, then second crack). the longer and hotter it goes, the more the bean's own taste (acidity, florals, fruit) gives way to the taste of the roast itself (caramel, cocoa, spice, smoke). the roast level is essentially the point at which the roaster stopped that movement.
light roast
the bean is dropped soon after first crack. acidity is bright, the body lighter, and the cup reads origin and variety: florals, citrus, berries, black tea. it's the choice for filter and alternative brewing, for anyone who wants to hear the terroir. light beans ask for more precise brewing — they don't forgive a grind that's too coarse or water that's too cool (you'll get sour and «hollow»). and they need a few days of rest after roasting to let excess co2 escape.
medium roast
the middle ground and the most forgiving option. acidity softens, caramel sweetness and a fuller body appear. it balances the bean's character with cosy notes of baking, nuts and milk chocolate. an all-rounder that works well in both filter and espresso, which makes it the easiest place to start if you don't yet know what you like.
dark roast
the bean is taken to second crack or close to it. origin notes step back and the flavours of the roast itself come forward — cocoa, spice, toasted bread, a bitter-edged depth. dense body, minimal acidity. the classic for a rich espresso and milk drinks, where you need to «punch through» the milk. these beans «open up» sooner after roasting and may show a little oil on the surface.
and what about «burnt»
there's a line past which roasting stops revealing the bean and starts hiding it. over-dark beans taste flat and ashy, with an oily sheen over the whole surface. that's not a style, it's a defect. a good dark roast is deep but clean, with a recognisable sweetness, no «ash» and no char. if coffee tastes bitter the same way no matter how you brew it, it was probably just over-roasted.
and don't confuse it with freshness
roast level and freshness are different things. even a perfectly roasted light bean will go flat in three months. read the roast date separately from the bean's colour: dark looks «oily» and fresh even when it's already stale, while light can look «dry» even when it's brand new.
how to choose yours
start with medium — it's the most forgiving and gives you a clear reference. love brightness, tea and fruit in the cup — move towards light (and take up filter). want body, chocolate and minimal acidity, especially for milk — move towards dark. and remember the main thing: there's no «correct» level, only the one that tastes right to you, for your method and your mood.