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I'm trying to make frozen yogurt manually (no machine), but I would like it to be soft-scoop. My first batches froze hard (tasty but hard), regardless of whether I stirred them every half-hour or not. I was advised to try Arabic gum, but that doesn't seem to make any difference. Am I trying the correct additive? If not, what should I be trying?

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The ice cream industry uses guar gum and xantham gum. cooking.stackexchange.com/questions/12777/… –  Pat Sommer Aug 14 '11 at 6:47

3 Answers 3

Add vanilla extract which contains alcohol. Most frozen yogurt/icecream recipes call for Vanilla flavoring anyways.

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You have to use a lot of alcohol to get ice cream to soften substantially, way more than you'd ever want to add (i.e. maybe a whole bottle, not a teaspoon or two). It'd be expensive and it wouldn't taste good. –  Jefromi Sep 29 '12 at 19:33
    
There are also a lot of gluten free and non alcohol based flavorings out there these days, so not all vanilla extract is alcohol based. –  lemontwist Oct 1 '12 at 14:29

Basically you can't actually make soft-serve style yogurt in a regular freezer. It's just too cold.

However, you can make it softer by doing one or more of the following:

  1. adding additional sugar. After a certain concentration, sugar prevents ice cream, sorbet and frozen yogurt from freezing as hard.
  2. Adding some concentrated source of alcohol. I often use an ounce or two of spirits or liqueurs in my ice creams (usually a 5-6 cup batch), which prevents the mix from freezing as hard because of alcohol's very low freezing point.
  3. Adjusting the fat ratio. I don't know the exact magic ratio of fat, though I'm sure someone else can find it for us. I've found that low fat and very high fat ice cream tends to freeze very hard.
  4. Adjusting the amount of air in your batch. The churning process that an ice cream maker would buy you adds a fair amount of air between the crystals and results in a softer batch.

An ice cream machine can also produce a result that you can serve up quickly after making so that you never get to the "hardening" stage that American-style ice creams go through when you put them in the freezer after churning.

I don't use gums in my ice creams, but the advantage that they give you has more to do with stabilization of the ice crystals, not softening, as far as I understand. They primarily help cope with the conditions of transport, as you tend to slightly melt the ice cream/frozen yogurt when you take it home from the store and then you refreeze it.

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If the gums don't work, can you just not freeze it quite as cold? I wouldn't alter your freezer temp if you have other food in it, but could you put it inside an insulated bag, inside the freezer, and not let it get to 0 degrees F? I think I read somewhere that the main difference after milkfat content between ice cream and gelato is that gelato is not frozen to as cold a temperature, which is what makes its consistency different. May not be true, but worth a try.

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Thanks for the answers so far. I'll experiment with the freezing temp and the other gums too. My son will happily eat the results regardless. :-) –  Alan C Aug 19 '11 at 13:40
    
Alternatively, put it in an insulated bag on the counter after freezing, before serving. Or just in the fridge for a bit before serving. The trick is to figure out how long it'll take to warm up enough... –  derobert Oct 9 '12 at 16:20

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