Place the mini/little marshmallows evenly on the dehydrator racks. I used my Excalibur Dehydrator and set the temperature at 150 degrees. These take anywhere from 24-30 hours to dehydrate completely. The time frame will always depend on the humidity of the room you are using to dehydrate your food item. Let the trays sit for a day or two (2 weeks is even better) before putting the marshmallows in jars to store in your pantry. I like to make sure the food is totally dry before using my FoodSaver to seal the quart mason jars.