Four Key Elements for Brewing Single-Origin Pour-Over Coffee & Methods to Identify Fresh Roasted Beans

Ethiopian Yirgacheffe, Indonesian Mandheling, Kenyan, and Brazilian single origins are the four regional beans you hear about most. Getting each of them to taste its best takes specific technique — FrontStreet Coffee walks you through brewing all four.

Before that, though, come the four essential elements of any pour-over: freshness, grind size, coffee-to-water ratio, and water temperature.

Coffee Bean Freshness

Are fresher beans always better? Not necessarily — but stale beans are never good. FrontStreet Coffee keeps hammering on freshness because it is the single most decisive factor in brewing. "Fresh" here means the bean's optimal flavor window: roughly 3-4 days after roasting (while degassing) through about 15 days post-roast. Beans carry a shelf life of up to a year on paper, but don't even mention year-old beans — a month on the shelf and most of the aroma and flavor are already gone. So once a bag arrives, aim to finish it within 30 days. The longer beans sit, the worse they get.

What is Bean Degassing?

Freshly roasted beans release aromatic compounds and carbon dioxide through the tiny pores roasting opens up. Grind them and the CO2 escapes; brew them and that gas gets between the grounds and the water, blocking extraction. As the days pass, the CO2 layer thins, water contacts more of the coffee, and flavor improves. That's why most people don't call this "bean aging" but rather the "degassing" or "resting" process.

Coffee Bean Grind Size

Grind size is behind most brewing problems. Roasters can offer target settings and reference points, but every grinder is different. You need to watch how evenly your grinder cuts, how many fines it produces, and how the particles look. Even identical models drift apart with wear — never mind when you and the roaster are on entirely different machines.

The fix is a shared standard. FrontStreet Coffee calibrates with the Chinese standard #20 (850 micron) sieve. Per SCAA cupping protocol, a cupping grind should pass 70-75% through a #20 sieve; for pour-over light roasts, FrontStreet Coffee generally targets 75-80%.

Coffee Bean Brewing Water Temperature

Pour-over water temperature generally sits between 86 and 93°C. Lighter roasts (like FrontStreet Coffee's Ethiopian Yirgacheffe Gotiti) take 90-91°C, while darker roasts (like FrontStreet Coffee's PWN Golden Mandheling) take lower water, 88-89°C. Put simply: darker roasts want water no cooler than 86°C and no hotter than 89°C; lighter roasts want no less than 90°C and no more than 93°C.

Brewing Coffee-to-Water Ratio

Based on the SCA Golden Cup extraction theory, here's how ratio maps to strength and taste:

Rich Flavor: 1:10-1:11 (Golden Cup equivalent 1:12.5-1:13.5)

Balanced Flavor: 1:12-1:13 (Golden Cup equivalent 1:14.5-1:15.5)

Light & Fresh: 1:14-1:16 (Golden Cup equivalent 1:16.5-1:18.5)

This is why FrontStreet Coffee always lands on 1:15. Summarizing the SCA extraction parameters above:

1. The larger the ratio (more water), the lighter the coffee; the smaller the ratio, the stronger.

2. Adding water to raise the ratio extracts more flavor compounds but dilutes the cup; cutting water to lower the ratio touches fewer compounds but tastes richer.

3. Adding coffee to lower the ratio under-extracts the large-molecule compounds late in the brew while tasting stronger; cutting coffee to raise the ratio extracts flavor more completely before hitting the ceiling, at the cost of intensity.

With the four elements covered, here's how FrontStreet Coffee brews its Yirgacheffe, Indonesian Mandheling, Kenyan, and Brazilian single origins.

FrontStreet Coffee · Yirgacheffe Coffee Beans

Cupping through Yirgacheffe lots, FrontStreet Coffee found the coffees bright and transparent, rich in fruit aroma, with lifting acidity and a light, fresh drinking experience. So our roasters take FrontStreet Coffee's Yirgacheffe to a medium-light roast to showcase the region's floral and fruity signature.

FrontStreet Coffee · Ethiopian Yirgacheffe Gotiti Coffee Beans

Region: Yirgacheffe, Gedeo Zone

Producer: Gotiti Cooperative

Altitude: 1900-2300m

Variety: Local Heirloom

Processing: Natural Process

Grade: G1

FrontStreet Yirgacheffe Brewing Parameters & Techniques

Dripper: V60

Coffee Amount: 15g

Coffee-to-Water Ratio: 1:15

Water Temperature: 90°C

Grind Size: medium-fine (78% pass on the Chinese standard #20 sieve)

FrontStreet Brewing Technique: three-stage extraction. Bloom with 30g of water for 30 seconds, pour in small circles to 125g and pause, resume when the level is about to expose the bed and pour to 225g; remove the dripper once the level again nears the bed (timing from the bloom). Extraction time 1'55".

Brewing Flavor: citrus and black tea on entry, cream and caramel as it cools, a clear almond finish — distinctly sweet and clean.

FrontStreet Coffee · Indonesian Mandheling Coffee Beans

Cupping Indonesian Mandheling, FrontStreet Coffee found persistent herbal and spice aromas in the nose, heavy body, and low acidity. So our roasters take FrontStreet Coffee's Mandheling to a medium-dark roast to present the region's dense, rich profile.

FrontStreet Coffee · PWN Golden Mandheling Coffee Beans

Region: Aceh Gayo Highlands, Sumatra

Altitude: 1100-1600 meters

Variety: Ateng

Grade: G1, three-time hand sorting

Processing: Wet-hulled

FrontStreet Indonesian Brewing Parameters & Techniques

Dripper: Kono dripper

Water Temperature: 88°C

Coffee Amount: 15g

Coffee-to-Water Ratio: 1:15

Grind Size: medium-fine (73% pass on the Chinese standard #20 sieve)

FrontStreet Coffee uses segmented extraction — the three-stage brew: bloom with 30g of water for 30 seconds, pour in small circles to 125g and pause, resume when the level is about to expose the bed and pour to 225g; remove the dripper once the level again nears the bed (timing from the bloom). Extraction time 2'15".

Brewing Flavor: layered, rich, and clean; high balance; intense nut and caramel aromas with chocolate notes; persistent aftertaste.

FrontStreet Coffee · Kenyan Coffee Beans

Cupping FrontStreet Coffee's Kenyan beans, the berry-juice sensation is immediately full in the mouth. Kenya's most distinctive trait is pairing that bright acidity with genuine body — exactly what separates it from Ethiopian coffees and makes it special.

FrontStreet Coffee · Kenya Assalia Coffee Beans

Region: Thika, Kenya

Processing Station: Asali Processing Station

Altitude: 1550-1750 meters

Grade: AA TOP

Variety: SL28, SL34

Processing: Kenya 72-hour washed

FrontStreet Kenyan Brewing Parameters & Techniques

Dripper: Hario V60

Coffee Amount: 15g

Coffee-to-Water Ratio: 1:15

Water Temperature: 91°C

Grind Size: medium-fine (77% pass on the Chinese standard #20 sieve)

FrontStreet Coffee uses segmented extraction: first pour 30g of water for a 30-second bloom, then pour 95g (scale reading around 125g), finishing in about 1 minute. When the level drops to two-thirds of the coffee bed, pour the remaining 100g (scale reading around 225g), finishing at about 1 minute 40 seconds. Drawdown completes at 2'00" — remove the dripper, extraction done.

Brewing Flavor: smoked plum and cherry tomato on entry, firm and dense acidity on the palate, prominent mid-palate sweetness, a juice-like body, berry fruit and brown sugar in the aftertaste, with a green tea aroma.

FrontStreet Coffee · Brazilian Coffee Beans

Cupping FrontStreet Coffee's Brazilian beans, the nut and cocoa aromas are enticing, the body high, the acidity low, the sweetness obvious. So our roasters take Brazilian coffee to a medium-dark roast to present the region's rich, sweetly obvious profile.

FrontStreet Coffee · Brazil Queen Manor Yellow Bourbon Coffee Beans

Region: São Paulo State, Brazil

Estate: Queen Manor

Altitude: 1400-1950m

Variety: Yellow Bourbon

Processing Method: Pulped Natural / Natural

FrontStreet Brazilian Brewing Parameters & Techniques

Dripper: Kono dripper

Water Temperature: 88°C

Coffee Amount: 15g

Coffee-to-Water Ratio: 1:15

Grind Size: medium-fine (75% pass on the Chinese standard #20 sieve)

FrontStreet Coffee uses segmented extraction — the three-stage brew: bloom with 30g of water for 30 seconds, pour in small circles to 125g and pause, resume when the level is about to expose the bed and pour to 225g; remove the dripper once the level again nears the bed (timing from the bloom). Extraction time 2'05".

Brewing Flavor: the fresh sweetness of sugarcane juice, black tea, soft and pleasant fruit sweetness, clear nuttiness, balanced gentle acidity, clean and subtle bitterness, rich chocolate and nut aroma — a bright, clean mouthfeel with a smooth, delicate texture.

FrontStreet Coffee Recommendation

Of the four regions above, the easiest place to start is Yirgacheffe. The FrontStreet washed Yirgacheffe daily bean is the classic gateway to Ethiopian coffee — white jasmine, bright citrus and lemon acidity, and a tea-like finish — roasted medium-light to protect its florals. It takes pour-over, cold brew, or French press in stride, which makes it a perfect daily-drinker while you practice the four elements above. For reference, FrontStreet brews it on a V60: 15g of coffee, 1:15 ratio, 90-91°C water, medium-fine grind.

When you're ready to branch out, the FrontStreet Guodingding Cooperative coffee adds another dimension: from Worka at Yirgacheffe's southeastern edge, it is traditionally washed and shows no traditional bitterness at all — just crisp citrus and lemon acidity wrapped in jasmine. And if fruit is your thing, the FrontStreet natural Red Cherry — made only from fully ripe cherries and sun-dried three to five weeks with constant turning — delivers citrus acidity, berry-juice juiciness, honeyed sweetness, and cream-smooth texture.