For canning, always follow current USDA or local extension guidelines for water bath canning applesauce.
Wash jars, lids, and rings, then sterilize jars by simmering them in hot water until ready to fill.
Reheat the applesauce until hot but not boiling, then ladle into hot jars, leaving 1/2 inch headspace.
Run a clean utensil around the inside of each jar to release air bubbles, then wipe rims clean.
Center lids on jars, screw bands fingertip tight, and process in a boiling water canner.
Process pints for 15 minutes and quarts for 20 minutes, adjusting for altitude per trusted canning charts.
Let jars cool undisturbed for 12 to 24 hours, then check seals before labeling and storing in a cool pantry.