There's a good reason to make homemade peanut butter: You control the ingredients, so you know you will have the safest, healthiest, tastiest peanut butter possible. However, one major difference between store-bought and homemade is that homemade peanut butter does not have the added preservatives that commercial products do. So, you must find a different way to preserve your homemade peanut butter. Storing it in the refrigerator will give it a shelf life of several months, and freezing it will make it last indefinitely, so there is no reason not to make your own natural peanut butter at home.
Empty your peanut butter into a jar or container with a tight-fitting, airtight lid. Screw the lid on tightly.
Set the peanut butter in the refrigerator. Peanut butter that is stored in the refrigerator will last for 1 to 2 months. If you won't be using the peanut butter regularly, or you made a large amount, freeze the peanut butter instead.
Use a spoon to mix the oils back together with the peanut butter before serving; they will have separated while they sat in the refrigerator. When you remove the peanut butter from the freezer, allow it to thaw completely, then stir it and serve it cool or at room temperature.