In order to prevent peanut butter from spoiling, we can do the following three things before preservation:
1, add a large amount of salt or sugar to the peanut butter;
2, put the peanut butter into a pot, preferably a pressure cooker, and boil it to sterilize it;
3, keep it sealed, and seal it up every time when you finish using it.
If you can do one or two of the above points, you can make the peanut butter preservation time can be extended.