Overnight Apple Butter - Crock Pot

1. (Evening) Cut and core apples (no need to peel), enough to fill your crock pot. 
2. Sprinkle over:  3 cups sugar, 2 tablespoons cinnamon (or more!), 1/4 teaspoon ground cloves, 1/4 teaspoon salt.
3. Place crock pot on high for 1 hour.
4. Mix and turn crock pot to low overnight (9+ hours).
5. (Next morning) Mix and uncover for one more hour, stirring occasionally to smooth...you can always blend this to make it really smooth.
6. Can or cool and freeze/refrigerate.

The recipe that I started with called for 5 1/2 pounds of apples...I didn't measure it out, but I have a large crock pot...maybe a 6 quart capacity. 

What about pear butter?  Do you think that would be good?  Would you tweak the recipe at all?  Please comment!!!  :)