I have tried making soy milk powder from store bought soy milk. I used my dehydrator, but a few hours into the process the milk was starting to smell sour. I have seen recipes that make soy milk powder from the soybeans itself, but I have no access to soy beans.
Has anyone have had succes making soy milk powder this way? Is it possible to dehydrate store bought soy milk without it turning sour?
I am thinking of trying dehydrating almond milk next. The goal is to make an instant chai latte powder. I like my chai latte best with soy milk but am open to whatever plant-based milk will dehydrate properly.