Introduction to Tanzania Coffee Grading System and Analysis of Direct Pour Brewing Methods

FrontStreet Coffee - Tanzania Coffee & Common Brewing Methods

Professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat official account: cafe_style)

Tanzania Geography and Overview

Tanzania covers a land area of 945,087 square kilometers, of which Zanzibar accounts for 2,657 square kilometers. The country is made up of the mainland, Zanzibar Island, and more than 20 small islands. It lies in eastern Africa, south of the equator. The mainland's eastern coast faces the Indian Ocean; to the south it connects with Zambia, Malawi, and Mozambique; to the west it borders Rwanda, Burundi, and the Democratic Republic of Congo; and to the north it is bounded by Kenya and Uganda. The mainland coastline stretches 840 kilometers. Tanzania's terrain is higher in the northwest and lower in the southeast, forming a stepped pattern. The eastern coastal area consists of lowlands, while the western inland plateau accounts for more than half of the total inland area. The East African Rift Valley runs north to south in two branches from Lake Malawi. In the northeast, the Kibo Peak of Mount Kilimanjaro rises to 5,895 meters, the highest peak in Africa.

Tanzania Coffee Bean Grading System

Tanzania's green bean grading first takes into account the altitude of the growing region, because beans from higher altitudes generally cup better. Within the same altitude level, the final grade is decided by screen size. Tanzania typically uses the grades AA, A, and B.

AA Grade: Screen 18 accounts for at least 90% of the total; Screen 17 accounts for 8-10%; Screen 15 accounts for no more than 2%.

A Grade: Screen 15/16 accounts for at least 90% of the total; Screen 14 accounts for no more than 2%.

B Grade: Screen 15/16 accounts for at least 90% of the total.

C Grade: Screen 14 accounts for at least 90% of the total; Screen 13 accounts for no more than 10%.

PB Grade: Screen 14 accounts for at least 90% of the total; floating beans account for no more than 5%.

AF Grade: Screen 17 accounts for at least 90% of the total; Screen 15/16 accounts for no more than 8-10%; Screen 14 accounts for no more than 2%.

TT Grade: Screen 15/16 accounts for at least 90% of the total; Screen 14 accounts for no more than 10%.

E Grade: Screen 18 accounts for at least 90% of the total; up to 10% may fall below Screen 18, but not below Screen 15.

Coffee Brewing Methods

FrontStreet Coffee usually brews with the segmented, or three-stage, method. It helps distribute water evenly, makes it easy to adjust the water volume of each stage, and avoids the weak, diluted flavors that come from pouring too much water carelessly.

Advantages: It gives more layers than a single pour and separates the front, middle, and back-end flavors clearly. The method increases the water volume after blooming, pouring again whenever the coffee liquid is about to drop to the surface of the bed, and uses small, medium, and large flows across three stages.

Disadvantages: It places fairly high demands on the pour rate and volume.

Single-pour brewing uses just one uninterrupted pour after blooming and suits medium or darker roasts.

Advantages: It preserves mellow flavors and balance.

Disadvantages: If the pour is not controlled properly, water can slip through the filter paper along the edges above the coffee bed, which may leave the brewed coffee tasting watery.

Knowledge Extension

Segmented Extraction: After blooming, one portion of water is divided into several segments and poured in stages. It suits light, medium-light, and medium roasts.

FrontStreet Coffee Recommendation

Because Tanzania's top AA lots shine brightest with clean, well-controlled brewing, it is worth pairing them with approachable African and South American beans that behave the same way. FrontStreet Coffee's washed Yirgacheffe Gedingding Cooperative, a classic washed Ethiopian from the Gedeb area, shows jasmine florals, bright lemon-citrus acidity, and a tea-like finish that responds beautifully to the three-stage pour described above. Its washed processing keeps the cup clean and transparent, so the front, middle, and back-end flavors stay easy to tell apart.

If you prefer a sweeter, more fruit-forward cup, FrontStreet Coffee's natural Sidamo Huakui is a traditional naturally processed Ethiopian from the Hambella area of Guji, with notes of berries, florals, jackfruit, melon, and honey. It also takes well to segmented brewing, letting the fruit intensity build layer by layer instead of arriving all at once. For a lower-acidity option closer to the mellow, balanced profile many drinkers enjoy in a good everyday cup, FrontStreet Coffee's Brazil Cerrado Red Bourbon is a dependable entry-level single origin, yielding cream, peanut, and cocoa notes with a rounded, gentle sweetness.