Although most store bought peanut butters would be stored in a kitchen cupboard, this is a totally natural homemade peanut butter with no additives or preservatives, so it can spoil. u003cbr/u003eIt is best to keep it in an air tight container and then in the fridge. It will keep for about 3-4 weeks. This will make it quite hard and more difficult to spread, but you can just pop it in the microwave for 30 seconds to soften it up.