I'm canning plums by water bath method. The problem is even though I stew the plums in syrup a few minutes first and then scoop them into mason jars and top with more hot syrup after 30 minutes of the hot water bath, all the fruit floats to the top of the jar.
In sauce pan, mix ingredients. Simmer uncovered 1-1.5 hours till thick as pudding. Pour into sterile jars and seal. Water bath for 10 minutes at 160 degrees F.
In a heavy medium saucepan bring to boil all ingredients. Stirring all the while as it comes to boil. Simmer 25 to 30 minutes or until mixture thickens, stirring often.
