Making Ahead: These granola bars will keep in the freezer for 3 months or the fridge for 2-3 weeks! If you wish to store them in the fridge, you can put them in a large ziplock bag or in an airtight container. If you wish to store them in the freezer, wrap them individually in plastic wrap and place them in a freezer safe plastic bag. Move to the fridge the day before eating to thaw.