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chocolate truffles! Chocolate tempering using pyRoast

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  • chocolate truffles! Chocolate tempering using pyRoast

    After successfully building a power control system for my Corretto
    roaster, my wife asked me if I could find a way to make chocolate
    tempering easier for when she makes chocolate truffles. Of course I
    had to try!

    If you havent seen it, you might wish to look at the long description of
    pyRoast and the automated power control for a Corretto here:

    http://coffeesnobs.com.au/YaBB.pl?num=1259627839

    The problem with making chocolate truffles is the tempering of the
    chocolate. To temper chocolate you have to put it through a pretty
    precise temperature profile. First you need to bring it up to 42C
    to melt it, then slowly drop it down to 32C by adding in seed
    chocolate, which imparts the needed crystalline structure to the
    chocolate.

    If you are off by more than a degree or two then it doesnt work, and
    you need to keep this narrow temperature range even while putting
    very cold chocolate truffles from the fridge into the bowl.

    The approach I took was to put two bowls (one inside another) on top
    of a heat gun. The heat gun was then controlled by the same power
    control device I use for my Corretto coffee roaster, which in turn
    is controlled by pyRoast, my little python coffee roasting UI.

    The outer bowl has a small amount of water in it (about 100ml or so)
    as a buffer, and the thermocouple is taped to the inner bowl.

    You can see the whole setup here:

     

    You can also see a movie of the whole process here:

     

    the movie was taken towards the end of the truffle coating, so there
    isnt much chocolate left in the bowl.

    To support truffle making, I added a new target control to pyRoast,
    which allows me to easily adjust the target temperature while it is
    running. You can see the new UI here:

     

    As usual, the code for pyRoast is here:

     [link]http://samba.org/tridge/pyRoast[/link]

    Happy truffling!

    Cheers, Tridge

  • #2
    Re: chocolate truffles! Chocolate tempering using pyRoast


    Awesome.

    I love the heat application height adjuster too
    (glad wrap & foil).

    Comment


    • #3
      Re: chocolate truffles! Chocolate tempering using pyRoast

      truffle snob?

      Comment


      • #4
        Re: chocolate truffles! Chocolate tempering using pyRoast

        The heat application is awesome. I can realize that to achieve this you need plenty of potential .  

        Comment


        • #5
          Re: chocolate truffles! Chocolate tempering using pyRoast

          Forgive my ignorance, but I never knew truffles were such a hassle to make!

          Comment


          • #6
            Re: chocolate truffles! Chocolate tempering using pyRoast

            Brilliant!

            I cant imagine letting my skills go now that I have mastered using a granite block and candy thermometer technique though. It took me a while to master and now Im too proud to let the skill go. No seed for me .

            Comment


            • #7
              Re: chocolate truffles! Chocolate tempering using pyRoast

              For very small batches I use the microwave method, works a treat.   Simply put about 80% of your callets in a plastic (not glass/ceramic) bowl and heat at 50% in 20 sec intervals, stirring well after each 20 secs.  Once it gets to the required temp (which varies a lot depending on type of chocolate, but 42 for 54% Callebaut works fine) add the other 20% and stir constantly until its melted in.  If it wont melt after say 1 min stirring, then give it a 10 sec blast and continue stirring.

              For larger batches I use my termpering machine (Rev1), but if Im just tempering a little to coat somehting then the microwave method is great.

              Tempering on a slab is way too hard for me - Ive tried several times, with very mixed results.  I gave up on it when I saw a top pastry chef make a mess of it on Iron Chef - if he can make a mess of it, then its too hard!

              Cheers
              Jonathon

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              • #8
                Re: chocolate truffles! Chocolate tempering using pyRoast

                i also dont know that ut truffles were such a hassle to make....but its worth it...

                Comment


                • #9
                  Re: chocolate truffles! Chocolate tempering using pyRoast

                  Originally posted by 67706969286D606461050 link=1263085051/7#7 date=1310375852
                  i also dont know that ut  truffles were such a hassle to make....but its worth it...
                  Yeahh, there are, but there are vry few people who can make them tasty. Hope your invention helps your wife! Looks awesome!

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