Combine apple sauce, sugar, and spices in a medium pot with a lid.
Bring to a low boil for 10 minutes, stirring occasionally. The sauce will thicken. Let the sauce cool for 5 minutes.
Serve warm over ice cream. (Unused portion can be refrigerated up to 1 week.)
Serve with a caramel sauce drizzle, walnuts, or other ice cream toppings.