You can buy caramel apples year round these days but what fun to make yourself and how delicious they are this time of year when such a wide variety of apples are so plentiful.
When you make them keep in mind caramel has a low amount of water and apples are acidic so neither are normally breeding grounds for Listeria but piercing an apple with a dipping stick causes a bit of apple juice to leak out and become trapped under a layer of caramel. This creates an environment that aids the growth of Listeria already present on the apple’s surface.
Listeria growth occurs more quickly when a caramel apple is stored at room temperature compared to refrigeration. Caramel apples should stay fresh up to one week if refrigerated.