Roast levels explained: from light to extra dark

Pick up two bags of coffee — one light roast, one dark — and you will already see the difference. Light roast beans are pale brown, dry, and dense. Dark roast beans are nearly black, slicked with oil, visibly lighter in weight. Same plant. Same country of origin, sometimes. Entirely different cups. Roast level is the single biggest variable in coffee flavour, and most people choose their bag without fully understanding what it means.

Here is what actually happens to coffee between light and dark, and where every blend in the Western Tamp range falls on that spectrum.

Coffee roast levels chart

The whole spectrum on one line each. Temperatures are the bean’s internal temperature at the point the roast is stopped, not the roaster’s air temperature.

Roast level	Temperature	Acidity	Body	Tastes of	In our range
Light	195–205°C	High	Light, tea-like	Florals, fruit, origin character	—
Light-medium	200–210°C	Med-high	Light-medium	Bright, clean, citrus	Morning Roundup
Medium	210–220°C	Medium	Medium	Caramel, nuts, milk chocolate	Campfire Blend
Medium-dark	220–230°C	Low-med	Full	Dark fruit, oak, molasses	Backroad Bourbon, High Noon Espresso
Dark	230–240°C	Low	Heavy	Bittersweet chocolate, smoke	Whiskey Creek
Extra dark	240°C+	Very low	Heavy, coating	Char, smoke, bitter depth	Midnight Ride

Read it left to right and the pattern is the same the whole way down: as the roast gets darker, acidity falls, body rises, and what you taste shifts from the bean to the roast.

What roasting does to a coffee bean

Green coffee beans are dense, grassy, and undrinkable. Roasting transforms them through a series of chemical reactions driven by heat — Maillard browning, caramelisation of sugars, and the development of hundreds of volatile aromatic compounds. The longer and hotter the roast, the more those original compounds are driven off and replaced with the flavours of the roast itself.

This is the central trade-off of roasting. Lighter roasts preserve more of the bean’s origin character — the terroir, the variety, the processing method. Darker roasts progressively replace that with roast character: chocolate, smoke, bittersweet depth. Neither is better. They are different products, designed for different cups.

Light roast

Light roasts are taken to around 195–205°C, stopping before the first significant crack in the bean fully develops. The beans retain most of their original structure. They are denser, harder to grind, and require slightly finer grinding or longer brew times to fully extract.

In the cup: bright, complex, high acidity. Floral or fruity notes, depending on origin. Tea-like body. You are tasting the coffee plant more than the roast process.

In the range: Morning Roundup sits at the light-medium boundary — bright and clean, accessible for everyday drinking without the intensity of a true light roast. It is the first cup of the day done right: clear, honest, and easy to love.

Medium roast

Medium roasts push to around 210–220°C, past the first crack and into the development phase. Some of the origin brightness remains, but it is joined by caramel sweetness and a fuller body. The balance shifts from complexity toward approachability.

In the cup: balanced, smooth, medium body. Caramel, nutty, or chocolate notes depending on origin. Lower acidity than light. This is the everyday workhorse roast — it suits most brew methods and most palates.

In the range: Campfire Blend is our medium. Rich, smooth, full-bodied — a coffee that works around a table or on a solo morning. This is the one that earns its place as the everyday blend. It suits everything from a filter machine to a cafetiere.

Medium-dark roast

Pushed into the upper range of 220–230°C, medium-dark roasts approach or enter the early stages of the second crack. Surface oils begin to appear. Origin character fades further, giving way to the roast: dark fruit, oak, molasses, and a warming sweetness. Body increases. Acidity drops.

In the cup: full, warming, with roast-forward notes. The coffee has presence. It works well with milk — the body holds up — but it also drinks well black for those who want depth without the edge of a full dark.

In the range: Backroad Bourbon is the medium-dark. Caramel, vanilla oak, dark chocolate. Built for long mornings and longer roads. High Noon Espresso sits here too — developed for espresso extraction, where the medium-dark profile produces a naturally sweet, low-acidity shot with good crema.

Dark roast

Dark roasts go to 230–240°C, into the second crack. The bean surface is visibly oily. Most origin character is gone. You are tasting the roast: bittersweet chocolate, smoke, charred oak. The body is heavy and coating. Bitterness increases — managed well, it is pleasant; pushed too far, it becomes harsh.

In the cup: bold, smoky, bittersweet. Works well as the base for milk drinks. Espresso with a dark roast gives you a strong, punchy shot that cuts through milk in a flat white or latte. Black, it demands respect.

In the range: Whiskey Creek and Midnight Ride occupy the dark range. Whiskey Creek has smoke, leather, and bitter chocolate. Midnight Ride pushes into darker territory still — bold, uncompromising, a roast that does not apologise for what it is.

Extra dark roast

Extra dark roasts push past 240°C, deep into the second crack. The beans are near black, very oily, and light in physical weight — much of the bean’s mass has been driven off as CO2 and water vapour. Bitterness dominates. Any sweetness is charred, almost caramelised to the point of ash. It is a divisive profile — some people live for it, most people find it too heavy for everyday drinking.

In the range: Midnight Ride sits at the dark edge of the range. If you want the deepest, most intense cup available, that is the one.

Which roast is right for you

• You want brightness and complexity: Morning Roundup (light-medium).
• You want balance and everyday reliability: Campfire Blend (medium).
• You want warmth and depth with some sweetness: Backroad Bourbon (med-dark).
• You pull espresso shots: High Noon Espresso (med-dark, espresso profile).
• You want bold and smoky: Whiskey Creek (dark).
• You want the deepest, darkest cup available: Midnight Ride (dark).

Browse the full range and match the roast to the cup you are after. The coffee is there. The choice is yours.