(directions are also from Simply Recipes)
Print these directions!
There are several ways to sterilize your jars for canning. You can run them through a short cycle on your dishwasher. You can place them in a large pot (12 quart) of water on top of a steaming rack (so they don't touch the bottom of the pan), and bring the water to a boil for 10 minutes. Or you can rinse out the jars, dry them, and place them, without lids, in a 200°F oven for 10 minutes. I chose to put them in the water since I had to heat it up to can the puree anyway.
Pour the jam into hot, sterilized jars and seal. If you plan to store the apple butter un-refrigerated, make sure to follow proper canning procedures. Before applying the lids, sterilize the lids by placing them in a bowl and pouring boiling water over them. Wipe the rims of the jars clean before applying the lids. I use a hot water bath for 10 minutes to ensure a good seal. Now, enjoy that this process is finally over, and laugh at yourself for ever deciding to do it in the first place.