How does roast level change geisha coffee beans?
Geisha coffee beans are usually sold as a light roast, and a test comparing light-medium and medium-dark profiles shows why. Using Panama Hacienda La Esmeralda Green Label Geisha, the lighter roast was dropped at 193.5°C with a roast color value of 66.2, while the darker one reached 196.8°C and a value of 52.4 after a longer first-crack development.
Flavor was checked by cupping and pour-over across aroma, acidity, sweetness and mouthfeel. The lighter beans showed more surface wrinkles and silver skin; the darker beans looked round and smooth. The lighter profile preserved the floral and fruity aromas Panama geisha is known for, while the medium-dark roast flattened those notes and pushed up sweetness and body.
Geisha coffee beans are usually presented as a light roast, but if they were roasted darker, how would the flavor change? Front Street Coffee used Panama Hacienda La Esmeralda Green Label Geisha as the sample and compared two profiles: light-medium roast and medium-dark roast. Through cupping and pour-over, it analyzes the impact of different roast levels on Geisha flavor from multiple dimensions such as aroma, acidity, sweetness, and mouthfeel. This article not only presents detailed experimental data and sensory descriptions, but also discusses why Geisha is better suited to a light roast and how to preserve its signature floral and fruity aromas during roasting.
Geisha coffee beans mostly appear on the market as a light roast. What is the reason behind this? Front Street Coffee became interested in this: if Geisha were roasted darker than usual, what flavor changes would it bring? To this end, Front Street deliberately roasted a batch of Geisha darker than its daily offering, intending to find out through comparison.
For this experiment, Front Street selected [Panama Hacienda La Esmeralda Green Label Geisha] as the subject.
[Front Street Coffee: Hacienda La Esmeralda Green Label Geisha Coffee Beans]
Country: Panama
Region: Boquete
Estate: Hacienda La Esmeralda
Altitude: 1,600 m–1,800 m
Processing method: Washed
Variety: Geisha
| Roast comparison
Front Street developed two roasting profiles, one being the curve for its regular daily offering, and the other slightly darker.
[Profile One]
The turning point occurred at 5 minutes, first crack began at 8 minutes 30 seconds at 184.2°C, and the beans were dropped after 1 minute 30 seconds of first-crack development at 193.5°C. The SCAA roast color value was 66.2, belonging to a light-medium roast.
[Profile Two]
The turning point was also at 5 minutes, first crack began at 8 minutes 20 seconds at 182.5°C, and the beans were dropped after 3 minutes 20 seconds of first-crack development at 196.8°C. The SCAA roast color value was 52.4, belonging to a medium-dark roast.
Observing the appearance of the roasted beans, the light-roasted beans had more surface wrinkles and obvious remaining silver skin; the medium-dark roasted beans appeared round and smooth, with relatively less silver skin.
| Flavor comparison
Front Street conducted cupping and pour-over tests on the Geisha at the two roast levels to compare the flavor differences.
Cupping
[Profile One] It presented bright citrus and lime acidity, prominent jasmine and chamomile floral notes, and a finish with creamy, cane sugar sweetness and green tea aroma.
[Profile Two] The sweetness was more pronounced, with flavors of caramel, chocolate, bergamot, and sweet orange.
Pour-over
[Profile One]
Parameters: 15 g coffee, coffee-to-water ratio 1:15, water temperature 90°C, grind size BG 5R (58% passing through a Chinese standard No. 20 sieve), extraction time 1'55" (timed from the start of blooming)
Method: Bloom with 35 g water for 30 seconds, pour in a thin stream to 124 g for a stage, then when the water level drops and is about to expose the coffee bed, continue pouring to 225 g, and when the water level drops and is about to expose the coffee bed, remove the dripper.
The flavor showed obvious chamomile and jasmine floral notes, bright fruit acidity, with a sweet-and-sour sensation of lemon, citrus, and bergamot on entry, honey and maple syrup sweetness emerging in the mid-palate, and a fresh green tea aroma in the finish, with a lasting cane sugar aftertaste. The overall mouthfeel was refreshing.
[Profile Two]
Parameters: 15 g coffee, coffee-to-water ratio 1:15, water temperature 88°C, grind size BG 5R (58% passing through a Chinese standard No. 20 sieve), extraction time 1'50" (timed from the start of blooming)
Method: Bloom with 34 g water for 30 seconds, pour in a thin stream to 120 g for a stage, then when the water level drops and is about to expose the coffee bed, continue pouring to 227 g, and when the water level drops and is about to expose the coffee bed, remove the dripper.
On entry there was pronounced caramel and chocolate sweetness, as well as oolong tea aroma. After the temperature dropped slightly, a faint, soft acidity of orange and bergamot could be felt in the finish. The overall mouthfeel was full-bodied and smooth.
| Summary
Comparing the two roast levels, Front Street believes that the light-roasted Geisha had a more prominent aroma, richer flavor layers, and an overall refreshing character; the medium-dark roasted Geisha had a fuller body, more obvious sweetness, and softer fruit acidity.
Although the medium-dark roasted Geisha also tasted good, the Geisha variety itself is rich in floral and fruity aromas. If roasted too dark with too long a development time, it easily loses many unique flavors, making the overall profile more balanced with sweetness becoming dominant. Therefore, in order to preserve these signature floral and fruity aromas, Front Street chooses to shorten the development time to retain more floral and fruity aromas and showcase the distinctive flavor of Geisha.
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The above content is compiled by CoffeeHunters, a coffee news website.
