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If you think that normal icecream is made from milk, is it possible to make it with Oat Milk? I'm not too sure if the lack of lactose in the oat milk would restrict the stickiness or formation of the icecream.

Is it possible to make oat milk icecream, or would it just turn into mush?

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Your problem is not the lactose, it is the fat. You need between 10 and 20% of homogenized/emulsified fat for a good icecream texture. You can try getting it from some other ingredient if you use "oat milk" which is mostly starch dissolved in water. –  rumtscho Jun 8 '13 at 17:56
    
Do you have any suggestions for other ingredient(s) to use as a substitute for that missing fat? –  Grace Jun 9 '13 at 1:21

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up vote 6 down vote accepted

Evidently, there are some recipes for frozen confections based on oat milk.

For example, Dia Designs provides "5 vegan ice creams", most of which are based on oat milk. They read more like sorbet recipes, due to the lack of fat in the mix.

If you were to try to create your own oat milk based frozen dessert recipes, I would suggest modifying a base sorbet recipe, as they are not as dependent on fat as ice cream recipes. The additional starches in oat milk compared to water should add slightly more body and mouth feel, and make the product more opaque than a traditional sorbet.

If you are not opposed to egg whites, you might also consider using sherbert recipes as your base.

Note: the lactose in dairy products does not have a huge effect on the chemistry of ice cream (it is a small part of the total sugar in the mix), although it could potentially help inhibit sugar crystal formation somewhat (this is not usually an issue in frozen desserts). If you want to replace its effect, a small amount of honey, maple syrup, or even corn syrup would be very similar.

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