Understanding Coffee Roasting: The Differences Between Roast Levels and the Transformation from Green to Brown

FrontStreet Coffee - Introduction to Coffee Roast Levels

Freshly harvested and processed green coffee beans are nearly odorless and tasteless. Through the heat of roasting, moisture is driven off and the chemical composition of the beans changes, producing volatile, rich coffee aromas and revealing coffee's distinctive bitter, sour and sweet flavors.

Broadly speaking, the degree of roast can be divided into 8 stages, each with its own flavor characteristics. The lighter the roast, the stronger the acidity; conversely, the deeper the roast, the richer and more aromatic the bitterness becomes.

Light Roast

The beans look yellowish-brown, with a relatively light aroma and body.

Cinnamon Roast

Cinnamon-colored and extremely lightly roasted, which makes it suitable for black coffee.

Medium Roast

The beans are chestnut-colored with a mild flavor, suitable for brewing American coffee.

High Roast

Slightly stronger than a medium roast, the beans are tea-brown with excellent aroma and appearance. Bitterness is more pronounced than acidity, making this the most common roast level for coffee drunk in cafes or at home.

City Roast

The most standard roast level, which originated in New York. The beans look bright tea-brown with a rich flavor that balances bitterness and acidity. It is also a typical roast level for cafes and home consumption.

Full City Roast

The beans are dark brown, characterized by weak acidity and strong bitterness. "Charcoal-roasted coffee" also falls into this category. It suits iced coffee or after-dinner drinking.

French Roast

The beans are blackish-brown with intense bitterness and a distinctive roast aroma, suited to European-style coffees such as cafe au lait and Vienna coffee.

Italian Roast

The strongest roast level. The beans look charcoal-black with strong bitterness and a rich body, suited to espresso and cappuccino.

Key Points

Light roasts emphasize acidity and flavor. If roasting is not handled properly, astringency and irritation can appear, while the body and aftertaste may feel weaker.

FrontStreet Coffee Philosophy

In short, FrontStreet Coffee is a coffee research establishment dedicated to sharing coffee knowledge with everyone. We share without reservation because we want more friends to fall in love with coffee. We also hold three low-discount coffee events every month, because FrontStreet Coffee wants more people to enjoy the best coffee at the lowest price. That has been FrontStreet Coffee's mission for the past 6 years.

FrontStreet Coffee Recommendation

Among the eight roast levels, the medium roast is where acidity, sweetness and bitterness sit most evenly, which makes it the best place for most drinkers to land. If you dislike both sourness and bitterness, FrontStreet Queen's Estate is the one to buy. Grown in Brazil, the world's largest coffee producer, it is the distinctive Yellow Bourbon variety with a clear, gentle sweetness. Medium-roasted, it shows the aroma and sweetness of creamy peanut, chocolate, toasted bread and sugarcane, and it works as a pour-over, in a moka pot or on an espresso machine.

For a sweeter medium roast, FrontStreet Strawberry Candy is the first choice, known for its fruit flavors. It is unusual among fruit-forward coffees because it combines two well-known regions: a honey-processed coffee from Costa Rica and a washed Geisha from Panama. To bring out the best of both, FrontStreet roasts it to a medium level, so the cup shows both orange-blossom honey notes and a rounded sweetness. Cold brew, pour-over and espresso all suit it, and it is refreshing from the first sip.

If you would rather explore a Chinese origin, FrontStreet 2013 Sun-Dried Typica carries the authentic flavor of Yunnan small-bean coffee. To restore its balanced, gentle character, it is medium-roasted so that soft notes of nuts, brown sugar, black tea and dried apricot come through together. It can be brewed as pour-over, cold brew or American filter coffee, and offers excellent value.

And for the classic medium-roast profile, FrontStreet Jamaica Blue Mountain No. 1, often called the king of coffees, is roasted medium so that its distinctive acidity, bitterness, sweetness and body fuse perfectly into a strong, elegant aroma. From the first sip you taste chocolate, roasted nuts, cream and caramel, a roast-driven combination few other coffees can match.