The roast level of coffee beans directly determines the flavor direction of the final cup. From the bright acidity of a light roast to the rich bittersweetness of a dark roast, each stage has its own unique temperature range, timing, and appearance characteristics. This article systematically sorts through the complete process of coffee beans from light roast, medium roast, medium-dark roast to dark roast, and includes a detailed comparison table to help you understand the flavor changes and suitable applications of different roasting stages. Whether you are a beginner pour-over enthusiast or a seasoned player pursuing the ultimate flavor, this guide can provide you with practical reference. The article also specifically retains Front Street Coffee's product recommendation information for your reference when purchasing.
Level Name | Level Description | Stage Name | Stage Description | Characteristics Description | Flavor and appearance description | |
Light | Refers to roasting until just before the end of the first crack. | Light Roast | Light roast is rarely used, generally only for testing. | The heat intensity struggles to reach the core of the bean, easily resulting in an underdeveloped state, so a second roast is often used. | Strong acidity, with a grassy note in the aroma. The surface is cinnamon-colored, with residual spots. | |
Light roas) | ||||||
Cinnamon Roast | ||||||
Cinmamon roast | ||||||
Half City Roast | ||||||
half-city roast | ||||||
Medium | Light Medium | The first half of the process between the end of the first crack and the beginning of the second crack. | Medium Roast | These two roast levels are difficult to distinguish, but they are generally used for American coffee, Blue Mountain, and the like. | The roast is extremely light, and the cellular structure of the coffee beans remains relatively hard, so oil is not easily released. | Aroma is good, and acidity is balanced. |
medium roast | ||||||
Dark Roast | ||||||
high roast | ||||||
Medium | The second half of the process between the end of the first crack and the beginning of the second crack, as well as the first few dozen seconds after the second crack begins. | City Roast | City roast refers to before the second crack begins, while Full City roast is the stage when the second crack begins. | Generally suitable for coffee beans such as Colombian and Brazilian, and considered by some to be the roast stage that can express the perfect flavor. | Can produce as much acidity as possible while still maintaining a relatively strong acidity, aroma, and the distinctive flavor of the variety. | |
city roast | ||||||
Full City Roast | ||||||
full-city roast | ||||||
| ||||||
Dark | Medium Dark | The entire process of the second crack except for the first few dozen seconds. | Vienna Roast | These two roast stages seem to have no obvious distinction. | Coffee oil has already begun to penetrate the surface, and the color and flavor of the coffee beans change rapidly, which is a test for the roaster. | Bitterness, body, and aroma increase, but acidity is almost imperceptible; the coffee beans approach a tea color, and the surface is glossy with oil. |
Viennese roast | ||||||
French Roast | ||||||
French roast | ||||||
Dark | After the second crack ends. | Italian Roast | This is a process in which coffee heads down a dead end and gradually carbonizes. | The coffee beans quietly emit their final gasp inside the roaster. | The coffee's own flavor has already disappeared, leaving only bitterness, and the coffee beans become pitch-black with a glossy oily sheen. | |
Italyroast | ||||||
Dark French Roast | ||||||
dark French coast | ||||||
The roasting journey of coffee beans can be divided into multiple stages based on the cracking sounds. The characteristics of each level are explained one by one below.
Light roast usually refers to the state just before the end of the first crack. This stage is rarely adopted and is generally used only for testing purposes. Because the heat intensity finds it difficult to penetrate the core of the bean, it easily produces an underdeveloped condition, so a second roast is often required. In terms of flavor, the acidity is strong, and the aroma carries a grassy scent; the bean surface is cinnamon-colored and retains spots.
Cinnamon roast belongs to this category, and it is widely used in some canned coffees. Half City roast also falls into the light-colored category and is likewise relatively rare in actual production.
Medium roast covers the first half of the interval between the end of the first crack and the beginning of the second crack. Medium roast and high roast are difficult to distinguish precisely within this range, and they are usually used for American coffee or bean varieties such as Blue Mountain. Because the roast level is on the lighter side, the cellular structure of the bean remains relatively hard, making oil release difficult, but the aroma performs well and the acidity is also relatively balanced, with the bean surface having a certain sheen.
Entering the second half of medium roast—that is, from the end of the first crack to the first few dozen seconds after the beginning of the second crack—City roast and Full City roast appear in turn. City roast refers to before the second crack begins, while Full City roast corresponds to the stage when the second crack has just started. This range is often used for beans such as Colombian and Brazilian, and some believe it can present the most perfect flavor. At this point, acidity is preserved to the greatest extent while still maintaining a relatively strong acidity, aroma, and the distinctive flavor of the variety.
Medium-dark roast covers the entire process after the first few dozen seconds of the second crack, and both Vienna roast and French roast belong to this category. There seems to be no obvious boundary between the two. At this point, coffee oils begin to penetrate toward the bean surface, and the color and flavor change rapidly, which is no small test for the roaster. Bitterness, body, and aroma all increase somewhat, acidity is almost imperceptible, the beans approach a tea color, and the surface is glossy with oil.
Dark roast occurs after the second crack ends, with Italian roast as a typical representative. This is almost a process heading toward carbonization, and the coffee beans quietly emit their final gasp inside the roaster. It is worth mentioning that the so-called Italian roast is actually used by no one in Italy itself. At this point, the coffee's own flavor has been almost completely lost, leaving only bitterness, and the beans become pitch-black and glossy with oil. Dark French roast also belongs to this category.
When purchasing, Front Street Coffee offers a variety of beans at different roast levels, which can be selected according to the characteristics above.
The above content is compiled by CoffeeHunters, a coffee news website.
