First put the peanuts in a blender.
Next, add the peanut oil and salt and mix until you have a creamy peanut mousse. If the peanut butter is not creamy enough, you can add some peanut oil or very little water.
If you prefer your peanut butter to be a little sweet, you can add some agave syrup.
Finally, you can fill the peanut butter into a jar.