Place cider in the bottom of a double boiler
Turn the heat up until the cider starts to boil, then reduce heat to low/med and let simmer
Place the top of the boiler onto the bottom portion and pour in the apples
Place lid on the pan, and simmer for about 15 minutes
You should still have cider at the bottom of the pan
Transfer apples to a bowl and stir in the spices, sugar, and cider from the boiler
Transfer the apples to a blender, or food processor and blend until smooth
Transfer the blended apple butter to a pan (the bottom of the double broiler you used before will work)
Cook on medium for about 5 more minutes
While the mixture is still hot, distribute the butter into mason jar or jars, and add lids right away so the steam seals the jars