Preheat the oven to 350°F (175°C).

In a bowl, combine the mashed bananas, rolled oats, peanut butter, egg, cinnamon, carob chips, and chopped apples until well mixed.

Roll the mixture into small balls or flatten into shapes and place them on a baking sheet.

Bake in the preheated oven for 25 minutes or until golden brown.

Allow to cool before serving to your dog.