For a quick and nonperishable snack, fruit leathers are perfect for keeping in your gym bag or purse. But costing almost a dollar, fueling up on these can quickly add up. With a food processor, an oven, and a lazy afternoon, it's easy to whip up a batch of fresh-tasting fruit leathers for a fraction of the cost. And bonus â these homemade fruit leathers contain 15 calories instead of the 45 in most store-bought brands.