Place all the ingredients in the Instant Pot. Close the lid, set the pot to "sealing." Select manual mode and set to 10 minutes. When the timer is done, you can choose to either "quick release" or let the pressure release on its own. It doesn't really make much difference to this recipe, so do whatever it easiest for you. I was busy doing other stuff at the time of making this, so I left it for about 10 minutes. When you're ready, carefully turn the vent to "venting" to release any extra pressure. Open the lid of the Instant Pot. The apples should be extremely soft. Using a stick blender, blend the apples until they are smooth. Spoon the apple butter into sterilized jars and seal.