Most condensed milk custards normally require eggs. But it turns out that a custard can be made with condensed milk and sour cream. Why does this work

I understand that eggs contain proteins that change from liquid to solid when cooked which gives the custard it's texture. How does sour cream accomplish this?

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4 Comments

scruz July 5, 2017
there is also a ginger, milk and sugar pudding that is a traditional chinese dessert. it is fascinating to see it made....look for it on youtube. i have no idea of the chemical reaction that occurs.
 
HalfPint July 5, 2017
There's an enzyme in the ginger that thickens (curdles) the milk.
 
HalfPint July 5, 2017
what custard recipe have you seen that has these 2 without eggs?

I'm going to hazard a guess that this recipe has some sort of acid (eg. lemon juice, vinegar, etc). What the acid does is curdle the dairy and thickens it. I don't think the sour cream is totally responsible for the texture, though most sour cream has a thickener in it (read the label, look for things like pectin, gelatin, carrageenan etc).
 
gridflash July 5, 2017
Actually, this came from a popular online recipe for key lime pie. It must have been the key lime juice that thickened the milk. Interesting. Thanks for the reply.
 
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