Chop apples leaving the skin on and add to slow-cooker.
In a medium size bowl add sugar, brown sugar, cinnamon, ground cloves, salt, ground nutmeg, vanilla extract. and mix well.
Then add mixture over the chopped apples in the crock-pot.
Mix well.
Cover with lid and let cook on low for 10 hours.
Then puree apple mixture with an immersion blender or a regular blender until smooth. I used a regular blender for mine.
Once the apple butter is smooth and cool, store in a mason jar or an airtight jar and store in the refrigerator. You can even freeze it for two months.
Or serve immediately on a roll, biscuit or a slice of toast.