At the time of recording, conditions were so severe on set that recording on-set foley was out of the question, much less getting clean dialog. Lo and behold, it's now May, all the snow is gone, and I still don't have my footsteps in the snow. I have some library effects, but I'd rather create my own.
I have heard that cornstarch makes decent snow sounds, as well as course sand.
What have you used to create snow-based foley effects without having the real stuff on hand?