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Roasting Monsooned Malabar (i-Roast2)

Postby robca on Mon Dec 27, 2010 5:01 pm

I'm starting to play with an I-Roast2, and I could use some help. I tried searching the forums, but didn't find a good match for what I'm looking for.

I have a few pounds of green Malabar Gold, a blend of monsooned coffees. It's a coffee that usually needs to be roasted on the lighter side (just into second crack), and I read that would benefit from a slow warm up time. I know I could experiment, but I thought I'd leverage the collective wisdom for a good starting point.

I like lighter espresso roasts (full city to full city+) and I prefer caramel and chocolate flavors vs floral/citrus notes (I don't like bright acidic coffees, and the roasted Malabar Gold I tries was very sweet).

From what I read, keeping the beans at around 390 for a longer time helps in reducing acidity (too long and it becomes a defect called baking)... what's the guideline to increase the caramel and chocolate notes?

Do you have any suggestions on a profile to use in my i-Roast2 as a starting point?

Thanks in advance, Rob
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Postby another_jim on Mon Dec 27, 2010 5:49 pm

In general, the roaster does not matter as much as the profile. Aged coffees are unusual in that you want to bring out the baked, malty flavors that develop prior to the first crack; whereas you generally want to avoid them on regular coffees. This means you should go for roasts that take a minute or two longer than normal to reach the first the crack.
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Postby DavidMLewis on Mon Dec 27, 2010 8:03 pm

Malabar Gold is also unusual in that the treatment of the beans leaves them with very low density, so it's quite easy for the roast to get away from you. You need to be fairly aggressive in lowering the heat as first crack gets going. When roasted properly, the beans will be evenly colored at the end of the roast, and you typically want to end at the beginning of second crack. If you can't slow the end of the roast enough, you will want to stop as rapid second starts. Under-roasted robusta is not very pleasant. Dr. John stops his roasts just before oil appears on the beans, and rests for three days or so.

Best,
David
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Postby Whale on Mon Dec 27, 2010 9:47 pm

And I may add that the color is not a good indication of the roast level. Going by color, on my latest roast (today) I would judge it to be city+ or Full city but it went well into the second cracks!

As others have said; be careful because it seems to always go faster than anticipated at first

I am yet to verify Jim's insight in extending the roast prior to first crack because indeed it always runs away on me. I did manage a 10 minute before 1C and 14 minutes overall today by stretching the ramp up to 1C. I am assuming that I will be able to comment in a few days.

I find it strange though that you say on the lighter side with just into second crack. To me second crack is on the darker side of things...
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Postby robca on Tue Dec 28, 2010 12:16 am

Thanks for all the replies.

I find it strange though that you say on the lighter side with just into second crack. To me second crack is on the darker side of things...


Well, I forgot I'm talking with experts :-). In my circle of friends, espresso roast is, by definition, charcoal with the shiny surface that means quality. I guess that's what years of Starbucks education did to them.

But even in Italy (where I come from), northern Italian roasts are lighter than southern Italian roasts, and that's what I meant. I probably misspoke, though, wrt the second crack. I'm still trying to figure out that part (and Malabar Gold seems to be lighter colored even into the second crack)
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Postby bean2friends on Tue Apr 12, 2011 11:08 pm

I had an interesting discovery with Malabar Gold recently. I roasted a batch in my rotisserie on my Weber gas grill. I started this batch in a cold grill. Within 3 minutes it was up to 420 degrees on the Weber thermometer, 550 on a digital I use by positioning the thermocouple close to the point where the beans reside in the rotisserie basket. I had 1st crack at 11 minutes, 30 seconds, held the temperature at 420/550 and when 1st crack was mostly stopped, I stopped the roast. I had read somewhere that I should (contrary to my best assumption) roast this to a light roast. My notes indicate it was a nice medium roast. I immediately put this in the freezer where I held it for a couple of months. Last week I removed it from the freezer and pulled a couple of triple shots in my mini-Vivaldi for Lattes. My wife thought hers was okay. But she is a smoker after all. I thought it tasted, not surprisingly, like old wet shoes, or something similarly unappetizing. Despite the possibility of passing this stuff on my wife, I set the Malabar Gold aside and got out a bag of Romance blend by Paradise, which I had roasted to a nice medium roast and which was quite delicious. So, when the Romance was gone, I tried the Malabar Gold again and found it much improved. I wouldn't roast it again the same way. In fact, I roasted a batch 2 days ago with a preheated grill to 450. This time I got 1st crack at 10m 45s (not that much different as I think about it), I cut the gas back to low at 1st crack, waited for 1st crack to end at about 14m 30s, cranked the gas all the way to high, and finished the roast at 16m 30s - somewhere in second crack with a slight bit of oil showing. Anyhow, the discovery is consistent with many things I have read and that is that sometimes, if the espresso tastes a little funky, let it rest some more. It worked for this 1st batch of Malabar Gold. I suspect this last batch I roasted won't need quite so much rest.
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