What is a medium roast?

A medium roast extends development for 2 to 3 minutes past first crack, reaching 215-224 °C bean temp (City+ to Full City), Agtron 65-80, with no visible surface oil. It is the sweet spot between preserved acidity and advanced caramelisation: full sweetness, notes of cocoa, toasted hazelnut and soft caramel, and a round body that adapts equally well to filter and espresso.

Medium roast historically covers American 'City Roast' at the end of first crack and 'Full City' pushed right up to the edge of second crack (around 222-224 °C). On a modern profile, the drop bean temperature lands between 215 and 224 °C with a Development Time Ratio (DTR) of 22-28 %. On a 6 kg batch that means 3-4 minutes of development after first crack, with a Rate of Rise (RoR) gently sliding from 8-10 °C/min down to 3-5 °C/min at the end of the curve, without kinks or flat spots.

Chemistry is driven by the caramelisation of residual sucrose, fructose and glucose: beyond 210 °C those sugars split into smaller aromatic molecules — diacetyl (buttery, caramel), furfural (bread, cooked sugar), maltol (long caramel). Melanoidins from Maillard reach their peak complexity. Origin acidity drops by 30 to 40 % compared with a light roast, making the cup easier to read for a broader audience; that is why the late-2000s American Third Wave roasters (Counter Culture, Intelligentsia, Stumptown) often positioned their blends and single origins at medium to bridge between commercial coffee and pure specialty.

Medium is also the most versatile terrain: it works on V60 as well as in espresso, in a home moka pot as well as in a French press. It is also more forgiving of extraction mistakes than a light roast, which is why many Belgian roasters (Brussels, Ghent, Liège) pick it for their house blend destined for hospitality. Visual cue: uniform chocolate-brown bean, no lighter edges (a sign of unevenness) and no oily spots (a sign of being overshot). A Belgian marker: many café-wine menus in Walloon Brabant and Brussels lean on a medium for regular service, saving light roasts for occasional cupping events.

Medium roast at a glance