Cider Apple Butter Recipe

Core and quater apples, but do not peel. Place in crock pot with apple cider. Cook on high(300!) until very soft, about 1-1/2 hrs. Press cooked apples through food mill or sieve. Measure. (Should be about 6 cups.) For every 1 cup fruit pulp, allow 1/2 cup brown sugar. Return to crock pot. Stir in lemon and orange peel and juice, cinnamon, allspice, cloves, and nutmeg. Cover. Cook on high(300!) until dark and thick, about 4 hours. Immediately pour into hot, sterilized glasses and seal.