Apple Butter in the Crock Pot (originally from Cooks.com)

Here's my memory of it (the recipe elves seem to have both removed it from my house and Cooks.com).

14 c diced baking apples (about 10-12 large ones - tart are best)
3 c sugar
2 c cider or apple juice
1 tablespoon cinnamon
1/4 tsp ground cloves

Throw the apples, sugar and cider into the crock pot and cook for 10 hours on low or 4 hours on high. Then, puree the apples, add the spices and cook on high for 1 hour. Uncover the crock pot if you want it thicker (I used the cover and we will likely use it for waffle syrup too). It will keep for a few weeks in the fridge. Otherwise, put it in 1/2 pint jars, leaving 1/2 inch headspace, and put in a water bath for 10 minutes. Yummmyyy...

Another option that looks good (I haven't tried it) is: http://www.foodnetwork.com/food/recipes/recipe/0,,FOOD_9936_256,00.html