This is the recipe that I've been using for years and years. I love peach butter because the flavor is so light and yummy. I buy the seconds at the orchard because I don't care what they look like - they're going to be smushed anyways and they're cheaper. Save the pretty ones for canned peach halves.
Cook over medium heat until thick enough to round up on a spoon about 30 minutes to an hour (this may also be done in a slow- 250 degree oven but it takes longer).
09You will need to stir frequently, making sure that it doesn't stick.
10Place in hot sterilized jars, leaving 1/4" headspace.