Top 10 Common Coffee Knowledge Summary: Coffee Varieties - Typica, Bourbon, and Geisha Flavor Characteristics

Top 10 Common Coffee Knowledge Points

1. Coffee Variety Flavor Characteristics

Through extensive cupping and flavor identification, FrontStreet Coffee has found that Typica varieties generally show combined citrus and nutty notes; Bourbon varieties also lean citrusy but with noticeably higher sweetness; while Geisha varieties are celebrated above all for their rich florals and citrus profile.

2. Washed vs. Natural Processing

The natural process is the oldest and most original way to prepare coffee. The cherries are simply sun-dried until their moisture content falls to 11-13%, after which the peel, pulp, and mucilage are removed. Compared with washed coffee, FrontStreet Coffee finds that naturally processed beans tend to be sweeter, carry fermented aromas, and offer richer fruit character and more layers.

Washed processing, by contrast, removes the peel and pulp first, then breaks down the mucilage through water fermentation before sun-drying. Naturals dry with the whole cherry intact. In FrontStreet Coffee's own lineup, the washed Blue Label shows more pronounced acidity and overall cleanliness, while the natural counterpart leans into fruit character with a fuller body and richer layers.

3. Coffee Roasting

As a rule, the darker the roast, the more prominent the roasted flavors, the lower the acidity, and the higher the bitterness; the lighter the roast, the higher the acidity and the lower the bitterness. Take FrontStreet Coffee's Golden Manor: before roasting, the roasting direction is set based on the beans' growing background. Golden Manor offers quality herbal aromas, low acidity, and strong caramel sweetness, so a medium-dark roast expresses this coffee at its best.

4. Bock Milk vs. Fresh Milk

Concentration measurements show that Bock Milk runs about 1 time higher in concentration and sugar content than fresh milk. Visually, Bock Milk is slightly yellowish while fresh milk is milky white. In texture, Bock Milk is richer, sweeter, and smoother. How is it made? Freeze fresh milk in the freezer, cut a small opening in the frozen block, place it upside down over a container, seal it with tape, and leave it at room temperature (27°C). After 4 hours, 946 ml of fresh milk releases 420 ml of Bock Milk — a release rate of roughly 44%.

5. Central and South American Coffee Beans

Among FrontStreet Coffee's daily bean series, the coffees from Central and South America include Guatemala Huehuetenango, Costa Rica Tarrazu, Colombia Huila, and Brazil Red Bourbon. These beans are defined by balance and body, typically presenting cocoa and dark chocolate flavors.

6. Grind Size

Grind size is one of the key factors shaping coffee flavor. FrontStreet Coffee has found that even with the same grinder, different grind settings yield very different results, so every coffee is sifted before brewing. For FrontStreet Coffee's Ethiopia COE #22 Typica pour-over, sifting shows that the total weight of grounds passing through the BG #5 sieve is 0.8 g.

7. Sieving the Grind for FrontStreet Coffee's Ethiopia COE #22 Typica

This bean is lightly roasted, and FrontStreet Coffee recommends a medium-fine grind (80% pass rate through the Chinese standard #20 sieve). In practice, weigh out 10 g of beans and sieve them; the total weight of the grounds collected is 0.8 g.

8. Catimor

Catimor is a cross of Timor and Caturra that began to be widely promoted in Brazil in the 1970s and 1980s. The variety yields heavily, grows as a short plant suited to dense planting, and shows reddish-brown new leaves. Viewed from the side, Catimor beans have slightly raised ends and a relatively slender tail.

Catimor was created in 1959, when Portuguese researchers moved Caturra — a Bourbon mutant from Brazil — to East Timor to hybridize it with Timor, a variety with Robusta heritage. The result has outstanding disease resistance and is 3 times more productive than Typica. Caturra is slender and round-bodied, while Timor is thick and large; Catimor inherits traits from both parents — long-bodied yet thick, with slightly raised ends in side view and a relatively slender tail.

9. Caturra

Caturra is a natural mutation of Arabica Bourbon, discovered in Brazil in 1937. It inherits Bourbon's lineage and with it relatively weak disease resistance, but out-yields Bourbon. The Caturra in FrontStreet Coffee's daily bean series — the Colombia Huila lot — shows flavors of dark chocolate, nuts, and caramel.

10. Should Pour-Over Coffee Be Drunk Hot or Cold?

Temperature changes how a cup tastes. If you want to experience a coffee at its best, FrontStreet Coffee recommends tasting it between 30°C and 45°C — the range where your taste buds perform at their peak.

FrontStreet Coffee Recommendation

Geisha is one of the most beloved Arabica varieties of all — and there are far more Geishas on the market than most people realize. Low yields, weak disease resistance, and demanding cultivation keep prices high, so it pays to know your options. In Panama, Hacienda La Esmeralda made the variety famous: FrontStreet Coffee's Red Label Geisha (officially "Esmeralda Special") grows at 1,600-1,800 m, must cup above 90 points, and each numbered batch comes entirely from a single small plot such as the Mario lot — letting buyers choose batches by subtle flavor preferences. The Green Label ("Private Collection") blends lots from multiple plots to showcase Esmeralda's signature high-altitude Geisha profile at a friendlier price, making it an outstanding value. If you're new to Geisha, the entry-level FrontStreet Boquete Geisha is the easiest way to taste classic Panamanian character — orange blossom and honeyed sweetness, an oolong-tea texture, delicate fruit acidity, and distinct layers.

Ethiopia, Geisha's birthplace, offers its own lineages. Geisha Village farm, founded by a couple 12 miles from the Gori Gesha forest on 475 hectares, selected varieties closest to the original forest Geisha. Its Gold Label (Geisha 1931, just 10% of production, crafted as an exquisite natural) cups with complex, rich flavors, while the Red Label (Gori Gesha, 15% of production, scoring 88+ on the SCA 100-point scale) is a single-terroir series with full traceability — farm block, variety, and processing date. For a gentler start, the FrontStreet Genji Chelba (Genlana Gesha) farm lot from Yirgacheffe, naturally processed on raised beds for 14-20 days and roasted medium-light, offers bright citrus acidity, elegant ginger-flower aroma, ripe fruit sweetness, and a silky, refined finish.

As for brewing: Geisha is a medium-light, floral-fruity coffee with a hard, dense structure that can sink and clog the dripper, so FrontStreet Coffee suggests a coarser grind (78% pass through a #20 sieve, about the size of fine granulated sugar) and 91°C water. Use 15 g of coffee in a small Hario V60 at a 1:16 ratio with a three-pour method: bloom with 30 g of water for 30 seconds, pour in slow circles to 125 g, then top up to 225 g once the bed drains halfway, finishing in about 2 minutes 10 seconds to 2 minutes 20 seconds. Geisha also shines as a single-origin espresso: FrontStreet's medium-roast Genlana lot pulls at 20 g dose, a 1:2 ratio, 25 seconds, and 40 g of espresso — dried apricot, caramel, and nuts in the cup.