Would you put cream in the soup? That might form ice crystals after a week or two, but if you leave the cream out, it seems like it would be fine.
I never have...but now that sounds good. haha I won't though so I can freeze it.
Hahaha - sorry! Whenever I freeze homemade ice cream for more than a week, it gets crystallized. You could try one portion with cream and put wax paper or plastic wrap directly on top of it; that might keep the crystals from forming.