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Does anyone else get this black and white with monsoon malabar?

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  • Does anyone else get this black and white with monsoon malabar?

    Every time i roast indian MMi get the most uneven roast. Is this normal snd does it affect the taste at all??? I know some people dont like MM, but it comes good after 2 weeks rest!
    Cheers

  • #2
    I have never experienced what you describe but perhaps if you can give us a bit more info on your roasting setup and maybe a few piccies, that will help us to help you...

    Mal.

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    • #3
      Yeah sorry about that. Meant to post pic...
      see I always get two total different ends of the spectrum, it's such an even sized bean too.
      im roasting in a barrel in a rotisserie oven.
      Attached Files

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      • #4
        Here's the roast setup. It roasts quite even with other beans. ThanksClick image for larger version

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        • #5
          On its side

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          • #6
            By the look of the picture the beans look a little over done. My preference for these are to be roasted a little before second crack on a steady yet moderate heat. Even dropping the beans prior to second crack i have found that some are darker than others. If it helps the beans in your picture that are lighter, thats the colour i would be aiming for.

            I have read online a few places saying they are not the easiest bean to roast, that may have to do with the appearance of the end result more than the taste. I dont worry about the mixed colours however i do follow a profile that ensures i drop them before second and that i have the flavours right. I let these sit atleast 4-5 days.

            Kind regards,

            Chris

            Comment


            • #7
              Have never experienced this with MM, in fact I find it one of the easiest SO Arabica's to roast, always turns out very evenly for me.

              Looking at your pic would lead me to wonder if there are two different varieties there! the darker beans look to be over done and the lighter ones underdone.

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              • #8
                Originally posted by Yelta View Post
                Have never experienced this with MM, in fact I find it one of the easiest SO Arabica's to roast.

                Looking at your pic would lead me to wonder if there are two different varieties there!
                I thought the same thing. I'm not super experienced but I found the MM really easy to roast albeit a little different to other beans but easy none the less.

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                • #9
                  Could end up being an interesting blend in the cup - combination of different degrees of roast of the same bean. Could end up a winner. Generally I find MM to need a longer rest period as well.

                  GrahamK

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                  • #10
                    Originally posted by Ploopyster View Post
                    [ATTACH=CONFIG]5114[/ATTACH]Yeah sorry about that. Meant to post pic...
                    see I always get two total different ends of the spectrum, it's such an even sized bean too.
                    im roasting in a barrel in a rotisserie oven.
                    Seems like the heat distribution throughout the batch is not being evenly conveyed.

                    It's a bit difficult to tell from your photos but I imagine you have sufficient stirring vanes located throughout the roasting drum? What is the rotational speed of the drum (rpm)? Also, how is the heat inside the oven circulated, natural convection or fan forced? Fan forced would probably do a better job. Lastly, what sort of batch size are you roasting? If the batch is too big you may not be achieving a thorough mixing of the beans throughout the batch.

                    Mal.

                    Comment


                    • #11
                      Originally posted by Dimal View Post
                      Seems like the heat distribution throughout the batch is not being evenly conveyed.It's a bit difficult to tell from your photos but I imagine you have sufficient stirring vanes located throughout the roasting drum? What is the rotational speed of the drum (rpm)? Also, how is the heat inside the oven circulated, natural convection or fan forced? Fan forced would probably do a better job. Lastly, what sort of batch size are you roasting? If the batch is too big you may not be achieving a thorough mixing of the beans throughout the batch.Mal.
                      +1 to this. I did the exact same thing (probably not as dark a roast as yours) but in a corretto in my garage. I decided to turn a standing fan on to stop myself from roasting also but ended up moving all the hot air over the open corretto and gave myself quite a varied roast.

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                      • #12
                        Yeah Mal,
                        It does appear that the heat isn't evenly distributed... There are 3 "vanes" in the drum, the RPM is about 30/min; unfortunately no fan in there, just 4x heating elements - 2 top and 2 bottom; interestingly I was having trouble with uneven roasts whn I was doing 300g green (to yield 250 odd), but since bumping it up to 450g green all my other roasts have been really quite even! Only the Indian MM has consistently been black and white.

                        I will try 300g next time to see if that makes any difference.

                        Cheers Mal
                        Originally posted by Dimal View Post
                        Seems like the heat distribution throughout the batch is not being evenly conveyed.

                        It's a bit difficult to tell from your photos but I imagine you have sufficient stirring vanes located throughout the roasting drum? What is the rotational speed of the drum (rpm)? Also, how is the heat inside the oven circulated, natural convection or fan forced? Fan forced would probably do a better job. Lastly, what sort of batch size are you roasting? If the batch is too big you may not be achieving a thorough mixing of the beans throughout the batch.

                        Mal.

                        Comment


                        • #13
                          Yeah true story Graham. I only wish I could compare with an even roast...
                          Originally posted by GrahamK View Post
                          Could end up being an interesting blend in the cup - combination of different degrees of roast of the same bean. Could end up a winner. Generally I find MM to need a longer rest period as well.

                          GrahamK

                          Comment


                          • #14
                            Yeah I know Chris, one bean is overdone yet the others almost green! A long rest period for this bean is essential.
                            Originally posted by coffeechris View Post
                            By the look of the picture the beans look a little over done. My preference for these are to be roasted a little before second crack on a steady yet moderate heat. Even dropping the beans prior to second crack i have found that some are darker than others. If it helps the beans in your picture that are lighter, thats the colour i would be aiming for.

                            I have read online a few places saying they are not the easiest bean to roast, that may have to do with the appearance of the end result more than the taste. I dont worry about the mixed colours however i do follow a profile that ensures i drop them before second and that i have the flavours right. I let these sit atleast 4-5 days.

                            Kind regards,

                            Chris

                            Comment


                            • #15
                              LukeMC and Yelta, the plot thickens. For me, all other beans are fine, but every time the MM is multicultural.
                              Originally posted by Lukemc View Post
                              I thought the same thing. I'm not super experienced but I found the MM really easy to roast albeit a little different to other beans but easy none the less.

                              Comment

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