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Thread: Sour tasting coffee after about 7-10 days from roa

  1. #1
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    Sour tasting coffee after about 7-10 days from roa

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi,

    I hope you can help? I have notice that after about 7-10 days from roasting the coffee has a sour taste but it disappears after about 15 days. The coffee beans are from Coffee Snobs Brown Beans. This has happened on all the beans the latest ones I have purchased are;

    Colombian Volcan Galeras
    Sulawesi Toraja

    Itís almost like I should leave them mature before using them; but it does not quite add up.

    I have checked the temperature, grind, extraction times etc..

    I even purchased some LavAzza beans from Woolworths for comparison. The results were as I expected; not sour but of course lack the flavor, body, aroma and crema of fresh beans.

    Not sure what else to say? I would be interested in your opinions.



  2. #2
    Mal Dimal's Avatar
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    Re: Sour tasting coffee after about 7-10 days from

    Welcome "bwilks".... [smiley=thumbsup.gif]

    Have you tried brewing with a slightly higher brew water temperature? That is, by using a slightly shorter flush before locking in the PF and hitting the brew switch...

    Mal.

  3. #3
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    Re: Sour tasting coffee after about 7-10 days from

    Hi Mal,

    I have even tried leaving it on for a couple of hours and with no flush but I still get similar results. I also checked the temperature of the water coming from the group head but this seamed ok.

  4. #4
    Mal Dimal's Avatar
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    Re: Sour tasting coffee after about 7-10 days from

    Hmmm,

    Sorry then mate :(, not sure what else to suggest. Maybe it is a blend that needs a more extended resting period before you open the bag? If you grab another lot from Andy, try to leave it rest for a minimum of 10 days and see how you go. We all know how fresh Andys BrownBay beans are so maybe its just a matter of being a bit more patient :-?

    Mal.

  5. #5
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    Re: Sour tasting coffee after about 7-10 days from

    have you tried extending your roast time

  6. #6
    Senior Member Dennis's Avatar
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    Re: Sour tasting coffee after about 7-10 days from

    Quote Originally Posted by fix link=1222086276/0#4 date=1222132609
    have you tried extending your roast time
    Hi Graham

    giggled like a schoolgirl - These were roasted by Andy! ;)

    bwilks, with respect, maybe what youre tasting isnt sour, just bright? I know with my own roasts that the beans can change substantially on a daily basis in the first week or so post roast, and often seem to almost miraculously settle with a longer rest period.

    Cheers!

  7. #7
    Wine_of_the_Bean
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    Re: Sour tasting coffee after about 7-10 days from

    You may also need to let them "breathe" for a bit to let them stabilise. When you open a new bag, the beans character tends to be all over the place for a bit, before they settle.

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    Re: Sour tasting coffee after about 7-10 days from

    giggled like a schoolgirl - These were roasted by Andy!

    well thats one less variable


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    Re: Sour tasting coffee after about 7-10 days from

    Thanks for all your comments they are always welcome.

    I have considered that I may be misinterpreting the taste as I am quite new to this but I think I am on right track. I have used these links here to help develop my tasting abilities. *If you have any suggestions in developing/learning/improving for evaluating and tasting I would be most interested. *

    http://coffeesnobs.com.au/YaBB.pl?num=1218074243/8#8
    http://www.wholelattelove.com/articles/images/coffee_tasting_flavor_wheel.jpg
    http://www.atdcusa.com/flavor.html

    http://www.roastmagazine.com/roasting101/cupping/cupping.html
    http://www.roastmagazine.com/roasting101/cupping/cuppingform.pdf

    I am thinking that the words; breathe, stabilize and mature are the likely fix. I am going to start logging the result on a daily basis it should be interesting over time.

  10. #10
    Mal Dimal's Avatar
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    Re: Sour tasting coffee after about 7-10 days from

    Quote Originally Posted by bwilks link=1222086276/0#8 date=1222294934
    If you have any suggestions in developing/learning/improving for evaluating and tasting I would be most interested.
    Gday "bwilks",

    Glad to see youre starting to sort it out mate; a very interesting (and enjoyable) journey this path towards knowledge of all things coffee.... The good thing is, it never ends ;)

    About improving ones potential for the development of a more discriminating palate, there is a great seminar coming up in Melbourne soon that deals with exactly the question you have asked. The inaugural seminar a few weeks ago was a great success and thoroughly enjoyed by all participants, so maybe it could be worth your while to consider attending? Anyway, heres a link to the details about this event...
    http://coffeesnobs.com.au/YaBB.pl?num=1220319907

    Cheers, :)
    Mal.

  11. #11
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    Re: Sour tasting coffee after about 7-10 days from

    When I get this sort of thing happening (and it has just happened to me with some of that Mountain Top Bin 35) I have been able to finesse it a bit by:
    . grinding the beans when I turn my coffee machine on (ie. an hour or so going off in the grinder is equivalent to at least a few days in the bag, methinks)
    . upping the temperature as suggested above (this lot of Bin 35s seems to need a much coarser grind and a much higher temperature than usual beans)
    . updosing and extracting slow, thick and short.

    Anyway, that seems to have fixed things up to drinkable. Now as the days are going by (day 8 now) things are definitely on the improve.

    And Ill try and do a better roast next time (I think I missed reaching second crack!)

  12. #12
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    Re: Sour tasting coffee after about 7-10 days from

    Hi,

    Update: I left the beans alone for a week and tried them aging and the sour taste has gone. The coffee taste great!



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