Wash apples, remove stems and cores, and cut into quarters or eighths. Cook unpeeled apples slowly with cider until very soft.
Press fruit and cider through a food mill. Combine pulp with sucralose and spices; simmer over low heat, stirring frequently, until the butter mounds without liquid separating.
Fill clean hot half-pint or pint jars, leaving 1/4-inch headspace; wipe rims and apply lids.
Process half-pints or pints for 15 minutes at 0–1,000 ft, 20 minutes at 1,001–6,000 ft, or 25 minutes above 6,000 ft.