Yirgacheffe Coffee Beans Pour-Over Flavor Characteristics - G1 and G2 Differences and Grading System

An Introduction to Yirgacheffe Coffee

The first specialty coffee I ever tasted was a Yirgacheffe—the elegant florals, the bright acidity, the cleanliness of the cup. I still remember it clearly, and I suspect many coffee drinkers could say the same. Yirgacheffe is, for a great many people, the bean that starts the whole journey. So here, FrontStreet Coffee would like to give it a proper introduction.

Yirgacheffe Growing Region

Yirgacheffe sits on the eastern edge of the East African Rift Valley at an altitude of 1,800-2,000 meters, making it one of the highest coffee-growing regions in Ethiopia. To the west lies Lake Abaya, a wetland since ancient times whose abundant water resources have long supplied the region's washing stations.

Yirgacheffe itself was originally just a small town in the West Arsi administrative region, though the land around it has been wetland for centuries. In the old language, "Yirga" means "to settle down" and "Cheffe" means "wetland."

With altitudes ranging from 1,700-2,100 meters, cool foggy weather year-round, and spring-like seasons, Yirgacheffe offers near-ideal conditions for specialty coffee and ranks among the highest-altitude coffee regions in the world. Although it falls within the Sidama administrative area, its flavor profile is so distinctive that it was eventually separated out and given its own identity—today it stands as the most renowned coffee region in all of Africa.

Yirgacheffe Coffee Bean Varieties

The varieties grown in Yirgacheffe are indigenous landraces: small-seeded, relatively round, and genuinely tiny—most lots fall between 14-15 screen size. Ethiopia is often called the natural gene bank of coffee, home to so many varieties that identifying and classifying them all is nearly impossible. The Ethiopian government, keen to protect its native coffee genetics, is also reluctant to publish detailed variety information, so exported Ethiopian beans are usually labeled simply as "Heirloom."

Local Processing Methods

Washed Processing Method

Washed processing removes stones, debris, and defective beans at each stage, which is why washed green coffee tends to look uniform and fetch higher prices than naturally dried coffee. But more stages mean more handling, more hygiene variables, and more room for things to go wrong—washed does not automatically mean better quality. FrontStreet Coffee's take is that washed coffee shows more pronounced acidity, better cleanliness, a medium mouthfeel, and the most consistent green bean quality from lot to lot.

Washed coffee goes through the following steps:

1. Removing Floaters
Cherries are poured into large water tanks. Underdeveloped, low-quality fruit floats to the surface while mature, dense cherries sink; the floaters are simply skimmed off.

2. Removing Pulp and Fruit Flesh
A pulping machine strips away the outer skin and fruit flesh, leaving behind the mucilage, parchment, and silver skin.

3. Fermentation
The goal here is to break down the sticky mucilage biologically. The pulped cherries are held in fermentation tanks until the mucilage degrades.

4. Washing
Once fermentation is complete, the beans are washed again to remove the residue left by the fermentation bacteria and any lingering impurities—thorough cleaning at this stage takes a lot of fresh water.

5. Drying and Removing Parchment, Silver Skin
The coffee is dried, by machine or in the sun, until the moisture content drops to 10-14%. Hulling machines then remove the remaining parchment and silver skin, and processing is complete.

Pros and Cons of Washed Coffee Bean Processing

Advantages:

1. Nearly every step happens indoors, which keeps impurities out of the beans and makes top quality achievable.

2. Because the pulp is removed right at the start, there's none of the mold risk you face when drying whole cherries.

3. The finished beans look clean and intact, and fetch strong prices on the market.

Disadvantages:

1. The process is complex and labor-intensive, making it far more expensive than the natural method.

2. It is thirsty work: producing 1 kilogram of coffee beans requires 40-50 liters of fresh water, so washed processing is rare in water-scarce regions.

Flavor: Washed coffee is typically clean with no off-flavors, showing bright acidity and fruit aromas thanks to the fermentation stage.

Because fermentation and washing demand such large volumes of fresh water, the method is uncommon in drought-prone areas. And while washed processing eliminates mold concerns, the fermentation itself does leave a footprint on the cup's flavor. Washed coffee delivers a clean taste free of off-flavors, with bright acidity and pronounced fruit character.

Natural/Dry Processing Method

The natural method—also called the dry process—is one of the oldest and most traditional ways to process coffee. Whole cherries are dried in the sun immediately after harvest. It is most common where sunshine is abundant or water is scarce; in Ethiopia, roughly 70% of all coffee cherries are processed this way. FrontStreet Coffee finds that compared with washed lots, natural coffee shows lower acidity, higher sweetness, and a clearer body, trading a little cleanliness for more berry-like complexity.

Natural coffee goes through the following steps:

1. Collection & Sorting
After harvest, cherries are hand-sorted to remove defective fruit—overripe, underripe, and insect-damaged cherries—as well as anything that isn't coffee.

2. Drying
The sorted cherries are moved to drying areas. Different regions use different setups: tarps, raised beds, concrete patios, and so on. Drying typically takes 3 to 4 weeks, until moisture falls to around 11%.

3. Hulling
Dried cherries go to processing plants for hulling and sometimes polishing, where the skin and dried flesh are stripped away.

4. Sorting, Grading & Storage
The hulled beans are sorted again to remove anything unsightly. This is where the drying process shows its quality: over-dried beans turn brittle and can shatter into fragments during hulling, while under-dried beans carry too much moisture and are prone to bacterial growth and mold. After sorting, the coffee is warehoused until export.

Pros and Cons of Natural Coffee Bean Processing

Advantages:

Apart from the initial floatation step, the entire process needs no water, and water that is used can be reused repeatedly—in regions with limited water resources, that's a enormous advantage.

Natural coffee also has a flavor profile nothing else can replace, so excellent farms have started taking it seriously: drying on raised beds to avoid contamination and sorting meticulously. That's why so many genuinely high-quality natural coffees exist today.

Disadvantages:

The natural method is entirely at the mercy of the weather, making the drying degree of the cherries hard to control. If the drying surface isn't clean, debris sneaks in easily. And since the flesh stays on the bean throughout drying, mold and rot are constant risks. In many people's eyes, this poor quality control caps how high a natural lot can grade.

Flavor: Natural beans look uneven, with wide color variation. But because the beans mature inside the fruit, insulated from the outside world, naturals tend to be intensely flavored, with winey fermentation notes and pronounced sweetness.

Natural processing in Yirgacheffe means selecting usable cherries and laying the whole fruit, skin and flesh intact, on raised beds to dry. This labor-intensive raised-bed approach keeps the fruit off the ground, preventing earthy taints and yielding exceptionally clean fruit flavors. After more than two weeks of drying, the dark brown cherries are stored professionally to finish developing their flavors; the beans are only hulled shortly before shipment—which gives you some idea of the sweetness in store.

Yirgacheffe Coffee Bean Grading System

Before the ECX (Ethiopian Commodity Exchange, established in 2008) came along, the CLU (Cupping and Liquoring Unit, a department under the Ethiopian Ministry of Agriculture) graded washed export coffee as G1 and G2, while natural processed coffee was graded G3, G4, and G5—meaning the highest grade a natural lot could receive was G3.

Once ECX took over, its grading system for Ethiopian coffee worked along two axes.

First, grades were defined by defect counts. Whether washed or natural, export green coffee with fewer than 3 defective beans per 300g earns G1; 4-12 defective beans per 300g earns G2.

After ECX was established in 2008, it graded coffee using a combination of the green beans' physical attributes and their cupping characteristics.

ECX sorts all Ethiopian coffee into three categories:

a. Specialty: few defects, high cupping quality

b. Commercial: below specialty grade but above the local consumption grade

c. Local/Domestic: heavy defects (unripe beans), off-season coffee, poorly stored lots with relatively poor flavors. (Consumed within Ethiopia; never exported)

Specialty and Commercial are the two categories exported to international markets, and each has slightly different grading standards.

Differences Between Yirgacheffe G1 and G2

Appearance Comparison

In terms of green bean appearance, G1 and G2 are very similar in size and shape—but on G2 you'll find insect-damaged and other defective beans much more easily.

Flavor Comparison

We also cupped the two grades side by side. Cupping washed Yirgacheffe G1 and G2 back to back, we arrived at the following:

Both show citrus, fruit tea, honey, and berry flavors. The difference is that G1 is cleaner and more clearly defined, while G2 reads somewhat lighter and a little muddled. On sweetness, G1 holds a slight edge.

FrontStreet Coffee Recommendation

If this article has you craving a proper Yirgacheffe, FrontStreet Coffee's washed Yirgacheffe everyday bean is the classic starting point—expect white jasmine florals, bright citrus and lemon acidity, and a gentle tea-like finish, all at a friendly price that makes it the ideal first specialty bean.

Ready for a step up? FrontStreet Coffee's washed Guodingding Cooperative lot, from the Worka area at the southeastern edge of Yirgacheffe, offers the same luminous citrus and jasmine character with even more clarity, while the natural Red Cherry lot layers tropical fruit, berry juice-like acidity, honeyed sweetness, and a creamy smoothness over that signature Yirgacheffe base. To brew either one, FrontStreet Coffee suggests a V60, 90-91°C water, 15g of coffee at a 1:15 ratio, and a fine-granular grind (about 80% passing a #20 sieve)—bloom with 30g of water for 30 seconds, pour to 125g, then finish to 225g.