Mandheling is a classic choice for many coffee enthusiasts just getting started, but its green beans have a relatively high moisture content and a darker color, making it often difficult to achieve a uniform roast—this is one of the reasons many Mandheling coffees on the market are roasted darker. This article will focus on this characteristic, sharing three practical approaches for improvement, and combining them with actual roast profiles to explain the timing between first crack and second crack, flavor development, and oil emergence patterns. Whether you're using a hot-air popcorn popper or other small roasting equipment, you'll be able to find a Mandheling roasting rhythm that suits you, allowing this bean to show the richness and complexity it deserves.
I've talked with you before about how Mandheling green beans themselves have a relatively high moisture content and a darker appearance, so achieving a uniform roast isn't easy. Precisely because of this, medium-roasted Mandheling often doesn't look very appealing, which is one of the reasons many roasters in Taiwan choose to roast Mandheling darker.
To address this difficulty, you can try the following approaches for improvement:
1. Store the green beans for another six months to a year, allowing them to further dehydrate and dry in a natural environment.
2. According to Leaves' experience, you can first roast for about one minute—just until the beans haven't yet turned yellow—to drive out some of the moisture, then pour them out and leave them until the next day for a second roast. However, doing this may compromise the flavor somewhat.
3. Accept the reality that it's hard to roast evenly, and after roasting, manually sort out the beans with obviously abnormal colors.
With this HB/PScornpopper I have on hand, its roasting chamber is slightly narrower than the Poppery II. Putting in 70 grams of Mandheling, first crack appears roughly between the third and fifth minute, and second crack begins around the eighth minute. My personal preference is to drop the beans around the sixth to seventh minute, which is a medium roast level. At this point the green bean's yeasty flavor has already disappeared, and although the color is still darker than medium-roasted beans of other varieties, the aroma and acidity are both quite good.
If you extend the roasting time to over nine minutes, the bitterness will overpower the acidity, though the throat sensation becomes very pleasant.
If you go beyond Full City to a very dark roast, even if you don't see oil on the bean surface at the time, don't worry—after two days the oil will gradually seep out.
The above content is compiled by CoffeeHunters, a coffee news website.
