Roast level is how dark the beans are taken in the roaster, and it shapes taste more than almost anything else in the cup. Light roasts keep more origin character and brightness, dark roasts taste bolder and rounder with less acidity, and medium sits in between. Roast level barely changes caffeine. Pick the level by the flavour you enjoy and the way you brew.
Roast level is the single biggest lever on how your coffee tastes. The same green beans can become a bright, fruity cup or a deep, cocoa-rich one, depending only on how far the roast is taken. Understanding light, medium and dark makes it far easier to buy a bag you will actually enjoy.
At We Are Coffee Co we small-batch roast our speciality coffees in Glasgow, and every speciality lot is graded SCA 84 or higher before it goes in a bag. If you are still getting to grips with what speciality grade means, our guide to speciality coffee explains the standard first. For the wider buying map, see our other coffee guides.
What "roast level" actually means
Roasting applies heat to green coffee over several minutes. As the beans heat, sugars caramelise, acids break down and the beans darken and lose moisture. Roast level simply describes where the roaster chose to stop: earlier for a lighter roast, later for a darker one.
The longer the roast runs, the more the origin character gives way to roast character. A light roast tastes more of the place the coffee came from. A dark roast tastes more of the roast itself: deeper, rounder, less acidic. Neither is better. They are different points on the same dial.
Light roast: bright, fruity, origin-forward
Light roasts are stopped soon after the first audible crack in the roaster. They keep the most of the bean's natural character, which usually means more acidity, more fruit and floral notes, and a lighter body. Acidity here is a flavour word, not a stomach word: it is the lively, juicy brightness you taste in a good filter coffee.
Choose light if you like noticing where a coffee is from. Our Ethiopian light roast is a clear example, with the bright, fruity lift that lighter roasting protects. Light roasts tend to shine through filter methods that show off clarity.
Medium roast: balanced and easy to love
Medium roasts are taken a little further, into or just past the end of first crack. This is the crowd-pleaser zone: enough origin character to stay interesting, enough roast development to add sweetness, body and a smoother finish. Acidity softens, and caramel, nut and chocolate notes start to build.
Choose medium if you want one bag that does everything well, from a morning cafetiere to a flat white. Our Brazilian medium roast leans into rounded chocolate and nut, which is why medium roasts are such reliable all-rounders.
Dark roast: bold, low-acidity dark roast coffee beans
Dark roasts are taken well past first crack, toward or into second crack. The beans turn a deep brown, sometimes with a sheen of oil on the surface, and the flavour shifts to bittersweet cocoa, toast and dried fruit. Acidity drops away and body builds, which is why so many people reach for dark roast coffee beans for espresso and milk drinks.
Good dark roasting is a craft, not a way to hide poor coffee. A well-made dark roast should taste rich and smooth, with sweetness behind the boldness. It should not taste flat, ashy or burnt. If a dark roast tastes only of char, it has usually been pushed too far. Our Indonesian dark roast is built for depth and body while staying smooth, and you can browse the full dark roast coffee collection if that is your style.
Does roast level change caffeine?
This is the most common roast myth, so it is worth being precise. Roast level has only a small effect on caffeine. Caffeine is remarkably stable during roasting, so a light roast and a dark roast of the same coffee contain almost the same amount.
The confusion comes from how you measure. Dark roasts lose more moisture and become less dense, so a scoop of dark beans weighs slightly less than the same scoop of light beans. Measure by scoop and dark can look very marginally lower in caffeine. Measure by weight, which is what we recommend, and the difference all but disappears. In short: choose your roast for flavour, not for a caffeine hit.
How to choose for your brew method
Roast level and brew method work together. As a simple guide:
For a cafetiere, medium and dark roasts give the full body and low-acidity cup the method suits best. For an AeroPress, medium roasts are a safe, flexible starting point, though lighter roasts can be lovely if you like clarity. For espresso, medium to dark roasts build the sweetness, body and crema that stand up to milk. For pour-over and filter, lighter and medium roasts let the brightness and origin character show.
None of this is a rule you must follow. It is a starting point. The best roast is the one you enjoy drinking, brewed the way you like it.
Our roasts by level
If you want to taste the difference for yourself, our speciality single origins line the levels up neatly: the Ethiopian for light, the Brazilian for medium and the Indonesian for dark. For a consistent everyday cup built from select origins, our speciality blend is engineered to taste the same all year. Browse everything in the speciality coffee collection.
Source notes
Primary sources used: SEO_CONTENT_PIPELINE_v1 sections 3, 4, 5 and 9; SEO_MASTER_PLAN 2026-06-08 section 3 commercial keyword targets; CLUSTER_BRAND_VOICE_RULES_v1 (Cluster 5 roastery and credibility); WACC Brand Guidelines v6 section 2 range and roast profiles; established coffee roasting science on caffeine stability and density; memory reference_wacc_asset_library_white_bag for roast and cluster mapping.
FAQPage Q&A
Is dark roast stronger than light roast?
It depends what you mean by stronger. Dark roast tastes bolder and more intense, with more body and less acidity. If you mean caffeine, the two are almost identical when measured by weight.
Does dark roast have more caffeine?
No. Roast level barely changes caffeine. Light and dark roasts of the same coffee contain almost the same amount by weight. Dark beans are less dense, so a scoop of dark can weigh slightly less, which is the only real difference.
Which roast is best for cafetiere, espresso or filter?
Medium and dark roasts suit a cafetiere and espresso, where body and low acidity shine. Lighter and medium roasts suit pour-over and filter, where brightness and origin character come through. It is a guide, not a rule.
Is light roast more acidic?
Yes, in flavour terms. Light roasts keep more of the bean's natural brightness, which tastes lively and fruity. Darker roasting breaks those acids down, so dark roasts taste rounder and lower in acidity.
What roast level are your coffees?
We roast across all three levels. Our Ethiopian is a light roast, our Brazilian a medium, and our Indonesian a dark roast, with our speciality blend built for a balanced everyday cup. Every speciality lot is graded SCA 84 or higher.
