How Coffee Roasts Are Categorized: Light, Medium, and Dark Phases

Ever bought a bag of coffee labeled ‘light roast’ or ‘dark roast’ and wondered what that really means? Whether you’re choosing beans for pour-over, espresso, or French press, the roast level shapes everything from flavor to body to brewing time. But the terms 'light', 'medium', and 'dark' are just categories—inside them lie precise phases defined by real physical and chemical changes. So what separates a City roast from a Full City+, and why does it matter?

Coffee roasting is broadly divided into three intensity categories—light, medium, and dark—with each category including specific roast phases. In total, there are eight defined roast stages: Light (Cinnamon, Light), Medium (City, City+), and Dark (Full City, Full City+, Italian, French).

What Determines a Coffee’s Roast Level?

A coffee’s roast level is determined by how long and at what temperature the bean is roasted. Roasters track bean color, surface texture, internal temperature, and the timing of key milestones like the first crack and, later, the start of the second crack. These markers help classify the roast into standardized phases.

The Eight Defined Roast Stages

Coffee roasts fall into three broad categories, each with sub-phases:

• Light Roasts: Cinnamon Roast, Light Roast
• Medium Roasts: City Roast, City+ Roast
• Dark Roasts: Full City Roast, Full City+ Roast, Italian Roast, French Roast

These stages reflect increasing development time and temperature, with corresponding changes in bean appearance, flavor, and aroma.

How Heat Changes Coffee Beans During Roasting

As beans roast, several visible and chemical transformations occur. Early on, moisture evaporates. Then come the Maillard reaction and caramelization, which build complexity. Eventually, the bean structure weakens, leading to first and second cracks. Each roast phase is defined by when these milestones happen and how far the roast progresses past them.

Here’s how the phases typically break down:

• Cinnamon Roast: Very light, roasted just before first crack; pale brown, dry surface, very light body.
• Light Roast: Just after first crack begins; light brown, dry, higher acidity, more origin character.
• City Roast: Midway through the first crack; medium-light brown, balanced acidity.
• City+ Roast: Slightly past first crack; medium brown, more body and sweetness emerging.
• Full City Roast: Just before the start of the second crack; medium-dark brown, richer, rounder flavor.
• Full City+ Roast: Just into the beginning of the second crack; deeper color, more roast flavor balance.
• Italian Roast: Well into the second crack; dark brown, shiny surface from oils, bolder and smokier.
• French Roast: Deep into the second crack; very dark brown to nearly black, oily, intense roast character.

These stages reflect not just color but also the roast duration and internal bean temperature evolution. Roasters may adjust airflow, drum speed, and temperature to hit these phases precisely.

Why Roast Phase Matters for Brewing

Different roast levels extract differently. Light roasts often need finer grind settings and higher brew temperatures to highlight their delicate acidity and floral or fruity notes. Darker roasts tolerate coarser grinds and hotter water, emphasizing bold, bitter, or chocolatey tones. Knowing your roast phase helps you fine-tune grind, dose, water temp, and brew time for the best results.

Frequently Asked Questions

What are the three main categories of coffee roast?

The three main roast categories are light, medium, and dark. Each includes specific phases: light includes Cinnamon and Light Roast; medium includes City and City+ Roast; dark includes Full City, Full City+, Italian, and French Roast. These define how lightly or darkly a coffee has been roasted based on observable and sensory benchmarks.

What is the first crack in coffee roasting?

The first crack is a key milestone in roasting when moisture inside the bean turns to steam, causing the bean to expand and make an audible cracking sound. It usually occurs early in the roast and marks the transition from light to medium roast levels, such as from Light to City Roast.

What’s the difference between City and City+ roast?

City roast is roasted to the middle of the first crack, resulting in a medium-light brown bean with balanced acidity and more origin flavors. City+ roast goes slightly past the first crack, yielding a medium brown bean with slightly more body, sweetness, and roast development while still retaining origin character.

When does the second crack happen in roasting?

The second crack occurs later in the roast, after the first crack, and signals further breakdown of the bean’s cellular structure. It marks the beginning of darker roasts such as Full City+, Italian, and French. The roast degree enters the dark range once the second crack starts, leading to oil on the surface and heavier body.

How do roast levels affect brewing?

Lighter roasts tend to produce brighter, more acidic cups and often require finer grind sizes and precise water temperatures to extract their delicate flavors. Darker roasts have more soluble compounds, bolder flavors, and often perform better with coarser grinds and slightly higher brew temperatures. Your roast level should guide your brewing variables.

Recommended FrontStreet Coffee Beans for Roast Phase Exploration

Explore roast phases with FrontStreet Coffee’s single origins and blends. The Ethiopia Humbera (Yirgacheffe region) shines as a light to City+ roast, offering bright citrus, floral jasmine, and stone fruit notes—ideal for tasting origin clarity. For City to Full City+, try the PWN Golden Mandheling, a classic Indonesian bean with sweet caramel, nuttiness, and a balanced medium-dark profile. If you want to taste a dark roast fully developed into French territory, the Black Cocoa Blend delivers bold dark chocolate, dried fig, and a heavy body. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.