Unflavored Protein Shakes

I was wondering if anyone has tried to add unflavored protein to soups to try and get the protein in.  I'm having trouble handling the flavored ones and wanted to try and hide it in something that I like the taste of.  Any thoughts and guidance is appreciated.

I have!  I added half a scoop to some mashed potatoes and couldn't taste it at all.  it did change the consistency of the potatoes, though, they were just a little less thick. 

that was the only time I added it to anything, though.  I've talked to others who've used it too and they all agree there is no flavor from it. 

I have added it to chicken broth - just half a scoop. You have to watch the temp of the soup though - I think if it's too hot (140 or higher), it will get lumpy or something. I could not taste it at all. I have also added it to SF pudding.