I made up a batch of apple butter yesterday and am preparing to can it right now.
I sorta-kinda used this recipe...but then I changed everything. So this is basically what I did:
5 1/2 pounds apples - cut into eighths
1 scant cup white sugar (I cut this back because the apples were pretty sweet, but you could probably add a little more)
3 teaspoons ground cinnamon
1/2 teaspoon whole cloves
1/2 teaspoon nutmeg
1/2 teaspoon ginger
1/4 teaspoon salt
Fill a crockpot with the apple pieces and turn it on high. Let that go for something like an hour (or two, if you're like me an a little forgetful). Stir the apples around and turn the crockpot down to low. Let it all simmer down for as long as it takes you to get up the courage to prepare your canning supplies. In my case, this was about 24 hours. Stir whenever you remember to do so, or as often as you want the smell of condensing apples to fill your house. The next day, run the apple mush through a food mill or, if you're like me and just don't get around to buying a food mill in time, squish it through a strainer or mesh colander, just to remove the stringy bits, seeds, and whole cloves.
I have no business telling anyone how to can, so just follow the directions here. Or eat it, fresh, by the spoonful. That works, too.
If you choose to can, this recipe yields approximately 3 pints of apple butter. From 5 1/2 pounds of apples. It's that strong.