The unopened packaged baking mixes can be stored in a cool, dry spot, like in a kitchen pantry away from direct sunlight or heat. Check the “best buy” date on the package and be sure to bake by that date for optimal freshness. Once the plant-based pet treats are baked, the thumbprint cookies for dogs or the botanical bark for cats can stored at room temperature for 1 day, in the fridge for 1 week, or in the freezer for 6 months.