01 -
Wash 5 half-pint jars, lids, and bands. Keep the jars hot while you cook the jam. Set up a boiling-water canner if you plan to store the jam at room temperature.
02 -
Add the apples, water, lemon juice, butter, cinnamon, and nutmeg to a large heavy pot. Cook over medium heat for 8-10 minutes, stirring often, until the apples are tender but not fully broken down.
03 -
Stir in the powdered pectin until fully dissolved. Bring the mixture to a full rolling boil over medium-high heat.
04 -
Add the granulated sugar and brown sugar all at once. Stir constantly and return to a full rolling boil. Boil hard for 1 minute.
05 -
Remove the pot from the heat. Stir in the vanilla and skim off any foam from the surface.
06 -
Ladle the hot jam into hot jars, leaving 1/4 inch headspace. Wipe the rims clean, add lids, and tighten the bands fingertip-tight.
07 -
Process jars in a boiling-water canner for 10 minutes, adjusting for altitude as needed. Let cool undisturbed for 12 hours. For refrigerator jam, skip processing, cool the jars, and refrigerate.