Layer half the apples into the bottom of a crockpot, followed by half the sugar, half the cinnamon and 1 teaspoon of clove.
Repeat with the remaining apples, sugar, cinnamon and ½ teaspoon of clove.
Cook the apples on low overnight (from about 8p - 6a). In the morning, stir the apples and turn the crockpot to high. Cook for an additional 5 hours, then remove the lid and cook for 2 hours longer. Stir the apples occasionally.
Use an immersion blender to puree the apples until smooth. Remove from heat.
Ladle the Apple Butter into clean, glass half-pint jars and seal. Process in a water bath (using instructions in text above) for 10 minutes. Cool jars completely and store in the pantry. Once opened, the Apple Butter should be stored in the refrigerator. Unopened jars will last one year, while opened jars will last one month in the refrigerator.