Bananas are one of the best foods to dehydrate. When ripe or even over-ripe, they can be dried into delicious almost taffy-life nutritious snack. Ripe bananas are often on sale, even during the winter when other fruits are more scarce, so keep your eye out for specials. Bananas can be dried in slices or in strips (quarter the banana the long way). If you have really ripe bananas, you can make banana leather.