Add lemon juice, vanilla, and water to the bottom of the instant pot insert.
Add the apples, sugars, and spices, then stir together.
Cook on high pressure for 60 minutes. Allow a 10 minute natural pressure release then vent.
Blend the contents of your instant pot.
Set the instant pot to the slow cooker setting, stirring occasionally until your desired consistency is reached.
You can use the saute function to reduce the apple butter to your desired thickness instead of the slow cook function. This will reduce the time but is more hands on.To convert to a slow cooker recipe, reduce water to 2 tablespoon and cook on low for 6-8 hours (or high 3-4 hours) in place of the pressure cooking step.