Introduction:This in-depth report documents how a coffee team discovered the optimal roast profile for Costa Rica’s Mozart raisin honey-processed beans through six different roast curve tests. From initially subtle flavors to the eventual bloom of floral and wine-like complexity, we provide a detailed analysis of two roasting strategies and expert pour over parameters to help coffee enthusiasts recreate this medium-light roasted specialty bean’s intricate flavor profile at home.
When a honey-processed coffee bean from Costa Rica arrives at the roastery, experienced roasters don’t rush to roast it. Faced with this Mozart bean, renowned for its raisin honey process, we first systematically gathered regional information and the flavor profiles provided by the green bean supplier. Then we embarked on weeks of roasting experiments—starting with a conservative, gradual heat reduction approach to explore foundational flavors, then shifting to an aggressive, fast-drying method to enhance aroma, ultimately locking in the golden curve that balances floral-fruity notes with fermented wine-like undertones.
This 2018 vintage Mozart bean employs a unique raisin honey processing method: after water sorting to remove defective beans on the harvest day, the parchment-covered beans are placed on elevated beds to sun-dry for at least 72 hours. The mucilage layer is removed while still maintaining moderate stickiness, followed by slow drying to preserve the solid bean structure endowed by the high altitude of 1950 meters. The green beans exhibit the typical honey-process yellow-green hue, and upon opening the bag, one can immediately smell a fresh citrus acidity and delicate fruity aroma. The beans’ higher moisture content requires the roaster to precisely control heat input.
The first three roasts employed a“gradual heat reduction + extended drying”conservative strategy. The charge temperature was consistently maintained at 200°C, with only the drop temperature and development time adjusted: the first roast dropped at 193°C with a 1 minute 50 second first crack development; the second roast increased to 194°C and extended to 2 minutes 10 seconds; the third roast further raised the drop temperature to 194.8°C, extending the development time to 2 minutes 30 seconds. Cupping results showed all three roasts exhibited good cleanliness in basic flavors, but overall leaned toward the lighter side—the first roast featured citrus and sweet orange as the main axis, accompanied by berry and raisin undertones; the second roast unveiled jasmine floral notes and rum aromas, with plum and caramel layers gradually emerging; the third roast shifted to a more subdued tone of cocoa and pears, with a faint smoky hint in the finish. Although each roast had its highlights, none met our expectations for the intensity typically associated with honey-processed beans.
The second round of experiments switched to an“aggressive heating + rapid drying”bold approach, also using three roasts but adjusting the heat distribution: the first roast dropped at 193.2°C with a 1 minute 30 second first crack development, delivering an astonishing start with osmanthus and fermented wine aromas, followed by layers of sweet orange, pineapple, and toffee flavors in the cup; the second roast dropped at 195°C, continuing complex floral notes, with a refreshing combination of berries and pears leaving a deep impression; the third roast went further to 197°C, showcasing distinct fermented wine aromas alongside a rich finish of nuts and cocoa. After cross-comparison, the first roast stood out with its sharper aromatic penetration and balanced sweetness, and was ultimately selected as the standard roast curve.
The key parameters of the selected curve include:Charge power reduced to 130, air damper opened to 3. Once the temperature climbed to 140°C, power was quickly increased to 160 to accelerate drying. In the mid-to-late stages, power was reduced to 130 to stabilize the bean character. When first crack occurred at 8 minutes 55 seconds, the air damper was gradually opened to 5, and the development time was controlled at 1 minute 30 seconds. The beans were dropped at 193.2°C when the orange blossom and fruity aroma symphony was detected in the aroma. This process successfully brought out the intense sweetness characteristic of honey-processed beans while preserving the clear acidity backbone of high-altitude beans.
For the characteristics of this medium-light roasted bean, we recommend using aV60 filter cone with a high water temperature of 90–93°Cfor pour over extraction: grind size set to BG 5R (equivalent to 58% passing rate on a Chinese No. 20 sieve), brew ratio 1:15, total extraction time controlled around 1 minute 50 seconds. The specific procedure is as follows: pour 30 grams of hot water for a 30-second bloom to initiate enzymatic reactions, then switch to a fine stream and circle-pour until reaching 120 grams for the first pour. Once the water level in the filter drops to the surface of the coffee bed, continue pouring to 225 grams to complete extraction. Finally, remove the filter just before the coffee bed dries up to stop extraction. Special note: due to the high sugar content of the honey process and the relatively light roast level, slightly increasing the water temperature can effectively extract the hidden floral and fruity aroma molecules, while the segmented pouring technique helps evenly extract the core substances of the beans.
The above content is compiled by CoffeeHunters, a coffee news website.
