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Making soup "foam"

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    Making soup "foam"

    We made some gazpacho the other day with fresh garden veggies. Pretty easy, generally speaking - Popped everything into the BlendTec until it was smooth: roasted some San Marzano-style tomatoes, some garlic, cucumber, a bit of jalapeno, salt, cilantro. I'm sure there were one or two ingredients, but that's not important right now.

    Poured the soup from the blender into the ISI (which we have only used for fresh whipped creme up to now), and SPLOOOOSHED it into small cups.

    Came out light and airy, almost mousse like in texture. Wasn't nearly as foam-like as we were hoping for, but we figure that's because the soup wasn't cooled down enough when we put it into the ISI, and/or maybe the soup wasn't a thin enough consistency.

    Going to try again, but with butternut squash soup a bit later. Wonder if doing this with an (literal) off-the-shelf soup would yield better "foam" results vs making the soup fresh and trying to water it down a smidge.

    Still, if you're looking for a slightly different soup appetizer (you wouldn't serve a whole bowl of this, more like a spoonful tasting), I recommend trying savory dishes in the ISI.

    Hey, they do this stuff on Top Chef all the time. What's stopping the average home cook from trying, other than having to make a 2nd batch to prove that the 1st one wasn't a fluke?

    Try overcharging your ISI if you can normally put 2 cartridges in use a 3rd. That's how we used to foam up some usually not foamed liquids.


      Originally posted by JohnPaul View Post
      Try overcharging your ISI if you can normally put 2 cartridges in use a 3rd. That's how we used to foam up some usually not foamed liquids.
      haven’t done this before.

      so you’re saying to screw one cartridge on, shake the ISI up…then unscrew the cartridge and screw on another, shake some more… then dispense? We’ve thought it was a one cartridge only thing, as we thought unscrewing the cartridge (or the dispenser nozzle) while the canister was under pressure would be a Very Bad Idea


      • JohnPaul
        JohnPaul commented
        Editing a comment
        Maybe test it empty first I don't know which canister and valve you have. Some of the larger ones use 2 just for whipping cream.
        But yes the first charge should stay held in by the check valve on the canister. It will Pfffft a little when released. If a huge amount of N2O escaped then you won't be able to add a second cartridge.


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