Overnight in the drier and they are as light and crisp as packing foam. Ready to re-hydrate or powder for soup stock Published September 24, 2016 at 2592 × 1936 in Puffball Cooking and Preservation Overnight in the drier and they are as light and crisp as packing foam. Ready to re-hydrate or powder for soup stock Overnight in the drier and they are as light and crisp as packing foam. Ready to re-hydrate or powder for soup stock