The Complete Guide to Coffee Roast Levels

When you buy roasted coffee, have you ever wondered why one bag tastes fruity and bright while another is smoky and bitter? The answer lies in the roast level—the crucial phase during which green coffee transforms under heat. Each roast degree changes not just color and texture, but also aroma, acidity, sweetness, and body. If you've been confused by terms like 'city roast,' 'cinnamon roast,' or 'French roast,' this guide explains exactly what they mean and how each roast affects your cup.

The six main roast levels are: light (including cinnamon), medium (half city, city, full city), and dark (Viennese, French, Italian). Each begins and ends at a specific point relative to the coffee’s two natural cracking sounds—first crack and second crack—which signal internal structural changes. These phases determine how much the bean is cooked, and thus what flavors survive or develop.

What Is Coffee Roasting and Why Do Roast Levels Matter?

Coffee roasting is the controlled application of heat to green coffee beans, causing chemical and physical transformations that develop flavor, aroma, and color. As beans heat up, moisture evaporates, sugars caramelize, acids degrade or stabilize, and aromatic compounds form. The roast level defines how far this process goes—and thus the final taste in your cup.

Roasters monitor roast progression by listening for the first and second cracks: audible indicators of internal bean expansion due to moisture and pressure. These 'cracks' divide roast levels into predictable stages. Your choice of roast level will determine whether the coffee tastes bright and acidic (light roast) or bold and bitter (dark roast).

The Six Roast Levels: From First Crack to Carbonization

1. Light Roast (Includes Cinnamon Roast)

This roast stops just before or at the end of the first crack. Light roast is rarely used commercially except for test batches. ‘Cinnamon roast’—a historic term—is sometimes applied to very light commercial canned coffee. Because heat often doesn’t fully penetrate the bean core, uneven roasting is common, leading some roasters to apply a second pass. These beans retain raw, grassy qualities and are extremely bright.

• Roast stage: Ends near the first crack
• Bean surface: Light cinnamon color with spotted surface
• Flavor: Intense acidity, grassy or herbal notes
• Oil: None on surface
• Common use: Testing, mass-market light canned coffee

2. Medium Roast (Half City, City, Full City)

This range begins at the end of the first crack and extends through the early part of the second crack. Medium roast includes:

• Half City / Light Medium: Just after first crack ends. Beans show early development with balanced acidity and some oils still absent. Surface shows mild sheen.
• City Roast: Midway through the interval between the cracks—often used for beans like Colombian or Brazilian. Acidity remains present alongside developed sweetness. Beans have slight gloss.
• Full City Roast: Begins the second crack or just before it fully develops. Popular for highlighting origin character without pushing into darkness. Acidity is bright, body is fuller, and balance is key.

All medium roasts retain the bean’s inherent characteristics while developing smoother mouthfeel. Oils are minimal or just beginning to emerge. This range is ideal for pour-over, drip, and American-style coffee.

3. Medium-Dark Roast (Viennese, French)

This phase starts after the first few seconds of the second crack and continues through much of its progression. Roast levels include:

• Viennese Roast (also called Light French or Continental): Begins well into the second crack. Body increases, acidity fades, and sweetness deepens. Coffee oils begin to show on the surface. Flavor is richer, with notes shifting toward caramel and nuttiness. A favorite among those seeking balance between origin and roast character.
• French Roast: Deeper into the second crack. The roast dominates more than origin flavors. Acidity is nearly gone, replaced by bold bitterness, heavy body, and a shiny, oily surface. Common in espresso blends, especially in Europe.

Beans are darker brown, nearing black, with visible surface oil. Roasters must carefully monitor time and temperature to avoid over-roasting and losing complexity.

4. Dark Roast (Italian Roast)

This final stage begins after the second crack has fully ended. The roast is now carbonizing the bean rather than just developing flavor. Italian roast—rarely used even in Italy—is where beans become extremely dark, nearly black, with a thick layer of surface oil. The coffee’s intrinsic qualities are mostly gone, replaced by a smoky, ashy bitterness. Some call this the 'end of the road' for coffee flavor.

• Also known as: Dark French, Italian
• Flavor: Bitter, burnt, minimal origin character
• Appearance: Black, oily surface
• Texture: Dry or overly slick
• Use: Traditional dark espresso, some legacy commercial blends

How Roast Level Affects Coffee Flavor and Brewing

As roast intensity increases, sugars caramelize more deeply, acidity decreases, and body typically increases—until it eventually deteriorates in very dark roasts. Light roasts preserve floral, fruit, and tea-like qualities, often preferred for single-origin pour-overs. Medium roasts offer balanced acidity and sweetness, suitable for filter and drip methods. Dark roasts emphasize bold body and bitterness, common in espresso blends or milk drinks.

Roast level also determines roast timing, development time post-first crack, and even the ideal grind size. Light roasts may require slightly finer grinds to slow extraction due to denser cell structure, whereas dark roasts can use coarser settings because of increased porosity.

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Frequently Asked Questions

What is the first crack in coffee roasting?

The first crack is the initial audible popping sound beans make around 385°F–400°F (196°C–204°C) as internal moisture turns to steam and pressure builds. It signals the beginning of light roast levels and the end of the drying phase. Roasting beyond this point leads to further development and darker roast styles.

What is the second crack in coffee roasting?

The second crack occurs around 435°F–445°F (224°C–229°C) when the cellular structure of the bean breaks down further, releasing oils to the surface. It marks the start of medium-dark and dark roast levels. Roast profiles after the second crack are bolder, less acidic, and oilier.

What roast level highlights origin flavors best?

Light to medium roasts (especially city and half city) best highlight a coffee’s origin characteristics, such as fruit, floral, or herbal notes. These roast levels preserve acidity and delicate aromatics, making them ideal for single-origin pour-over or filter brewing.

Which roast level is best for espresso?

Most commercial espresso blends use medium-dark to dark roasts (full city to French or Italian). These roasts produce heavier body, lower acidity, and more crema. However, many specialty shops now use medium or even light roasts for single-origin espresso to showcase unique flavors.

What does 'cinnamon roast' mean?

'Cinnamon roast' is an old term for a very light roast that stops right at or just before the first crack. It produces a bean with grassy, herbal notes and high acidity. The name refers to the light cinnamon-brown color, but it’s rarely used today outside of budget or mass-market coffee.

Why do some beans look oily and others don’t?

Surface oils appear as roasting progresses past the first crack. Light roasts have no oil because the beans aren’t hot or porous enough for oils to migrate. Oils emerge during medium-dark and dark roasts, especially in the second crack phase, resulting in a shiny, slick exterior.

Recommended FrontStreet Beans for Light to Medium Roasting

For exploring light and medium roast profiles, try FrontStreet Coffee’s Ethiopia Yirgacheffe Gedeb Cooperative—bright with citrus, jasmine, and berry, ideal for showcasing origin brightness. The Ethiopia Humbera (Hambela) is a juicy, tropical fruit-forward Geisha that thrives at medium-light levels. For a berry-forward option, the Kenya Little Tomato features SL28/SL34 with crisp acidity. All are expertly roasted to preserve floral and fruit notes. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.