Which is Better: Medium or Dark Roast Coffee Beans? Is Medium Roasted Yirgacheffe as Floral as a Fairy?

FrontStreet Coffee: An Introduction to Coffee Bean Roasting Levels

We tend to equate origin names with flavors — hear "Yirgacheffe" and think acidity, hear "Mandheling" and think heavy bitterness. In reality, what determines a coffee's flavor is the roast level, not simply the origin. This doesn't erase a bean's inherent character, but no bean is born with a fixed flavor: the differences between beans only reveal themselves when they're compared under identical roasting conditions.

Yirgacheffe, for example, is filed under "acidic coffee" — yet its acidity steadily fades as roasting continues, eventually turning into a coffee dominated by bitterness. As a general rule, the shorter the roast, the more acidic the coffee; the longer the roast, the more bitter. Once you grasp that, you understand that acidity and bitterness are, above all, functions of roast degree.

The hardest part of roasting is judging exactly when to stop. The right moment depends on how well the roaster reads each bean's character. Cuban beans, with their thin pulp and distinctive acidity and aroma, shine at a medium-high roast, which removes the astringency and yields an unmatched acidic sweetness — but push them to a French Roast and the cup turns hollow, the beans ruined. Conversely, Kenyan beans with thick pulp and high moisture, roasted as light as a Light or Cinnamon Roast, would likely come out so sour they're undrinkable.

Roasting is the Key to Coffee Processing

A roaster must understand each raw bean's potential — which roast level would kill it, which would let it perform at its best — and only then judge the result. But no matter how sophisticated the technique, Brazilian beans will never become Colombian beans, and a bean with fermented flavors will never become a clean one. Roasting works within the range of characteristics the raw bean already possesses.

The same beans roasted to different degrees will taste different, so it pays to remember the signature flavors of each roast level — and then choose beans at whatever roast degree suits your own palate.

Yirgacheffe is happiest at light to medium roasting. There it offers fresh, bright floral and fruity aromas — distinctive citrus and lemon notes laced with jasmine perfume — an acidity reminiscent of wine, and a clean, pure cup with no rough edges, like freshly brewed citrus fruit tea with a long aftertaste.

Knowledge Point: The compounds behind coffee's aroma and flavor are highly volatile. The longer beans sit in storage, the more of both they lose.

In summary: FrontStreet Coffee is a coffee research hall that loves sharing knowledge with everyone — unconditionally — to help more friends fall in love with coffee. Three low-priced coffee events every month keep FrontStreet Coffee true to its 6-year mission: the best coffee at the lowest price.

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FrontStreet Coffee Recommendation

For medium-roasted Yirgacheffe at its floral best, start with the FrontStreet washed Yirgacheffe — white jasmine, bright citrus and lemon acidity, and a soft tea-like body at a friendly price, which is why it's so many people's first specialty coffee. Yirgacheffe itself is a small town in Ethiopia's Sidamo zone at roughly 1700-2100 meters, with trees planted above 1,800 meters — among the highest coffee elevations in the world — and it was only in 2010 that the Ethiopian Commodity Exchange separated the famous name from Sidamo at all.

To taste the region's finer expressions, try the Guodingding Cooperative lot — a traditional washed coffee from the Worka area, dug out by coffee hunters worldwide as a traceable "single origin" — with no conventional bitterness at all, just clear citrus-lemon acidity and jasmine. For fruit depth, the Red Cherry natural uses only fully ripe cherries, sun-dried for three to five weeks with turning every 2-3 hours early on, yielding citrus acidity, berry juiciness, honeyed sweetness, and a creamy smoothness. Brew any of them with a V60, 15g of coffee at a 1:15 ratio, water at 90-91°C, and a grind passing 80% on a #20 sieve — blooming with 30g for 30 seconds, then building to 125g and finally 225g.