How Much Difference is There Between Dark and Light Roast Coffee Beans? How to Choose the Roast Level for Washed Shillan Coffee Beans

FrontStreet Coffee - Introduction to Coffee Roasting Levels

The lighter a coffee is roasted, the higher its acidity. For milk-based coffee, though, people usually prefer a milder flavor with nutty notes, a silky texture and higher sweetness. Unless you have specific preferences, choosing a light roast or cutting back on milk will make the coffee very acidic.

By contrast, medium roast is the most common, though it too has different levels. Generally speaking, a medium roast has lower acidity and stronger bitterness with a richer body, thanks to the longer roasting time, which makes it more compatible with milk than a light roast. Its moderate bitterness, combined with the sweetness of milk and a gentle acidity, is easier for most customers to accept.

Today the popularity of dark roast is declining. Because of the longer roasting time, the acidity almost disappears and the bitterness becomes very pronounced. Paired with milk, the coffee takes on the bitterness of dark chocolate, which many people regard as the most classic coffee flavor. Since its character is not especially distinctive, it needs no further description.

As a consumer, if you prefer a "stronger" coffee, ask the barista how it was roasted before you choose. If the coffee is lightly roasted and you find it isn't strong enough, ask for a double espresso—but be careful, as it may turn too acidic. If it's a medium roast, the strength should satisfy you. If only a light roast is available, ask the barista to reduce the milk, or simply tell them you don't like overly acidic coffee and see what they suggest; alternatively, you can choose another brewing method, such as pour-over.

Light roast better expresses a coffee's origin flavors, because fewer roasting flavors from the Maillard reaction are produced. When we cup coffee, for example, we mostly use a light roast so that each taster's palate can clearly experience the coffee's flavor while minimizing the influence of the roast. The key issue, however, is that many green beans are not suited to light roasting, especially hybrid varieties of Arabica and Robusta.

Take Yirgacheffe washed Shalan: roasted very lightly, the caramelization effect is low, which can highlight the floral and fruity aromas and bright acidity. Some Arabica varieties hybridized with Robusta, on the other hand, taste very unclean when lightly roasted. If development is insufficient, astringency, harshness and sharp acidity all appear at once. From this we can understand that green beans suited to light roasting are mostly high-quality beans that present floral and fruity characteristics.

Knowledge point: The source of coffee's aroma and flavor is highly volatile. So the longer coffee beans are stored, the more aroma and flavor they lose.

In short: FrontStreet Coffee is a coffee research hall, happy to share coffee knowledge with everyone. We share without reservation just to let more friends fall in love with coffee. We also hold three low-price coffee events every month, because FrontStreet Coffee wants more people to drink the best coffee at the lowest price. This has also been FrontStreet Coffee's guiding principle for the past six years.

FrontStreet Coffee Recommendation

Whichever roast level you favor, FrontStreet has a bean to match. If you lean toward the brighter, more floral end of the spectrum, the FrontStreet Natural Huakui SOE is a light-to-medium option from Ethiopia's Guji Hambela region, where the coffee grows at 2,300 meters. Its natural processing builds sweetness, and the medium roast keeps the elegant florals and fruit while adding a touch of caramelization—so an Americano or latte brings cream, cocoa, berry, soft floral and black-tea notes. If high sweetness is more your style, the FrontStreet Costa Rica Blackberry SOE is a honey-processed single-origin roasted medium: fresh and balanced as an Americano, and full of cranberry-cookie, raisin and nut flavors with milk.

For those who prefer a fuller, darker profile, the FrontStreet Classic Blend is designed for espresso and the moka pot, and its standout is crema—even a beginner on a non-professional home machine can pull a dense, fine layer. Built on the traditional Mamba recipe, it is rich and smooth, easy for veterans and newcomers alike, and works for both home and café use. The FrontStreet Dark Cocoa Blend is a cost-conscious alternative made from 100% Arabica with plenty of crema, a full body and a friendly price, while the FrontStreet Premium Blend pairs Brazil Cerrado with Colombia Huila for a classic, familiar espresso taste. If you want a Brazilian single-origin espresso, the FrontStreet Brazil Queen Estate SOE uses the Yellow Bourbon variety; roasted medium-dark and pulled on an espresso machine, it yields butter-cookie, macadamia and toasted-bread creaminess.