I picked up some packets of "ice cream mix" for strawberry, etc. from WalMart. Instructions are to use 4 quarts of milk, only. Don't see why they can't use powdered milk reconstituted. Heck, after MRE's it's got to be better! Just in case, I'd stick with chocolate or strawberry...not sure vanilla would cover the powdered milk taste...but, again, when it's 145 and you've been eatting MRE's I bet you would get no complaints...
Debbie -- (Proud grandaughter of WWI Army LT sharp shooter, and daughter of WWII & Viet Nam "Liberty Ship" veteran)
"...To know that even one life has breathed easier because you have lived, that is to have succeeded." --Ralph Waldo Emerson