These Peanut Butter Oatmeal Balls do not require to be refrigerated - another great bonus! They should be kept in an air-tight container in a cool spot like your pantry and will last for up to a week. If you find them to be a bit sticky, place some Baking Paper to separate the balls. If it is really hot in your kitchen, you can store these balls in the fridge, although they are unlikely to melt. In the fridge, they will tend to harden and get drier so only store them in the fridge if really needed.